You want to make better choices about what touches your skin all day. But finding underwear that’s actually sustainable, comfortable, and made with materials you can trust feels harder than it should be. Most conventional underwear contains synthetic fabrics, harmful dyes, and questionable manufacturing practices that affect both your body and the planet.
This guide breaks down the 10 best sustainable underwear brands available in Australia right now. Each brand has been evaluated for their materials, manufacturing ethics, comfort levels, and real value for money. You’ll find options made from organic cotton, bamboo, and other natural fibres that are genuinely better for you and the environment. Whether you’re after everyday basics, period underwear, or something with specific support features, this list covers the top picks across different styles, sizes, and budgets. No fluff, just practical information to help you choose underwear that aligns with your values without sacrificing comfort.
1. SLY Collective
SLY Collective leads this list as an Australian-designed brand that brings a fresh approach to men’s sustainable underwear. This Melbourne-based company specialises in bamboo boxer briefs with a built-in pouch design that addresses the most common complaints men have about traditional underwear. Their focus on eliminating chafing while maintaining environmental responsibility makes them stand out among the best sustainable underwear brands available in Australia today.
Overview and standout features
You’ll find that SLY Collective’s signature inner pouch separates and supports everything naturally, preventing the skin-on-skin contact that causes chafing during your day. The longer leg design stops the underwear from riding up, which means no more adjusting yourself throughout the day. What sets this brand apart is the integrated pocket built into each pair, giving you a secure spot for essentials like keys, cards, or cash when you’re travelling or at the gym.
If you want to explore our range, why don’t you take 20% off your first order – use SLY20 at the checkout. Remember you have a ‘first pair guarantee’ as well, so you’ve got nothing to lose.
Sustainability and materials
SLY Collective uses bamboo viscose fabric as their primary material, which grows with minimal water compared to conventional cotton. The bamboo they source requires no pesticides or fertilisers during cultivation, and the plant naturally biodegrades at the end of its life cycle. Their manufacturing process produces less chemical runoff than traditional cotton farming, making each pair a more responsible choice for your wardrobe.
Bamboo fabric naturally regulates temperature, keeping you cooler and potentially supporting healthier sperm production.
Comfort, fit and support
The pouch design receives consistent recommendations from urologists, particularly for men recovering from procedures like vasectomies. You get customised support that holds everything in a slightly elevated position, promoting better blood flow and preventing age-related sagging. The bamboo fabric stays breathable even during Australian summers, reducing overheating and moisture buildup.
Styles and sizing options
SLY Collective offers their boxer briefs in multiple size ranges from small to XXL, with a focus on accommodating different body types. You can choose from various street-inspired designs featuring graffiti and tattoo artwork, giving you sustainable underwear that doesn’t sacrifice style.
Price range in Australia
Individual pairs typically cost between $19 to $45, with multi-pack options bringing the per-pair price down. The brand offers free shipping on orders over $100 and provides a comfort guarantee with full refunds on your first pair if they don’t meet expectations.
If you want to explore our range, why don’t you take 20% off your first order – use SLY20 at the checkout. Remember you have a ‘first pair guarantee’ as well, so you’ve got nothing to lose.
SLY Collective Best-Selling Bamboo Pouch Boxer Briefs
If you want to explore our range, why don’t you take 20% off your first order – use SLY20 at the checkout. Remember you have a ‘first pair guarantee’ as well, so you’ve got nothing to lose.
2. Boody
Boody brings Sydney-based expertise to sustainable basics with a complete focus on bamboo viscose fabric. This brand has built a reputation across Australia for delivering super-soft underwear that works for everyday wear while maintaining genuine environmental credentials. You’ll find their range covers both men’s and women’s styles, making them one of the most accessible options among the best sustainable underwear brands in the country.
Overview and standout features
You get industry-certified production when you choose Boody, with multiple certifications backing their ethical and sustainable claims. The brand earned endorsement from Jane Goodall, which speaks to their legitimate commitment to environmental responsibility. Their transparency sets them apart, as they provide detailed breakdowns of their bamboo processing methods and maintain a publicly available code of conduct for all partner facilities.
Sustainability and materials
Boody cultivates their bamboo without pesticides, insecticides, or fertilisers, relying on the plant’s natural pest resistance. You benefit from fabric that requires no artificial irrigation during growth, significantly reducing water consumption compared to conventional cotton. The bamboo viscose they produce uses a closed-loop system that recaptures and reuses processing chemicals, minimising environmental impact.
Bamboo’s natural growth cycle and processing method make it one of the most sustainable fabrics available for intimate apparel.
Comfort, fit and support
The bamboo viscose fabric feels exceptionally soft against your skin, with a smoothness that improves after each wash. You experience natural temperature regulation as the fabric wicks moisture away from your body, keeping you comfortable during Australian heat. Their underwear maintains shape well through multiple washes without losing elasticity.
Styles and sizing options
Boody offers multiple cuts and rises for both men and women, including bikini briefs, boxer briefs, and thongs. You can select from basic colours and patterns, with sizes ranging from XS to XXL across most styles.
Price range in Australia
Individual pieces typically cost between $13.95 and $21.95, making Boody one of the more affordable options for sustainable underwear. You’ll find multi-pack deals that reduce the per-piece cost even further, with free shipping available on orders over certain thresholds.
3. Nico Underwear
Nico Underwear operates from Brisbane and delivers sustainable underwear through a commitment to transparent manufacturing and environmental responsibility. This brand combines recycled materials with organic fibres to create pieces that work for daily wear while maintaining genuine ethical credentials. Their detailed approach to sharing manufacturing information makes them stand out among the best sustainable underwear brands you can buy in Australia.
Overview and standout features
You benefit from Nico’s extensive transparency about where and how they produce each piece. The brand publishes detailed information about their manufacturing process on their website, giving you visibility into every step of production. Their extensive collection covers basics through to more structured pieces, with options that suit different preferences for rise and coverage.
Sustainability and materials
Nico creates their underwear from a blend of recycled cotton and nylon alongside organic cotton sources. The standout material is Lenzing Modal, a high-quality botanical fibre made from sustainably sourced beechwood trees. This combination gives you fabric that performs well while reducing environmental impact compared to conventional options.
Lenzing Modal’s production from beechwood trees creates a sustainable fibre that maintains exceptional softness through regular wear.
Comfort, fit and support
The fabric blend delivers incredibly soft comfort against your skin throughout the day. You experience a substantial feel that holds up well through multiple washes without losing shape or developing pilling. Their pieces maintain consistent support without tight elastic that cuts into your waist or legs.
Styles and sizing options
Nico offers midi, high-waist, and super high-waist briefs alongside g-strings and other quality basics. You can choose from various neutral and accent colours that work under different clothing types, with sizing that accommodates most body shapes.
Price range in Australia
Individual pieces typically cost between $25 and $35, positioning Nico in the mid-range for sustainable underwear options. You’ll find their pricing reflects the quality materials and ethical production methods they maintain across their range.
4. Underwear for Humanity
Underwear for Humanity operates with a social mission that extends beyond environmental sustainability to direct community impact. This Australian brand produces soft, comfortable underwear from Tencel eucalyptus fibre while donating a pair to women in need for every purchase you make. Their model combines sustainable materials with tangible social good, making them a standout among the best sustainable underwear brands available in Australia.
Overview and standout features
You support women in need directly through your purchase, as the brand donates one pair for every pair sold. Their expanded range covers everyday basics, period underwear, and maternity bras, giving you multiple sustainable options under one brand. The company maintains a focus on comfort and practicality while keeping their social mission central to everything they produce.
Sustainability and materials
Underwear for Humanity creates their pieces from Tencel fabric, a eucalyptus-based fibre that requires significantly less water than conventional cotton during production. The brand works with BSCI certified and SEDEX approved manufacturers in China, ensuring ethical labour practices throughout production. You get underwear dyed with OEKO-TEX certified safe dyes, which means no harmful chemicals touch your skin or pollute waterways during manufacturing.
Tencel’s sustainable harvesting and processing methods make it one of the most environmentally responsible fabrics for intimate wear.
Comfort, fit and support
The eucalyptus-based fabric delivers exceptional softness against your skin while maintaining breathability throughout the day. You experience comfort that works for extended wear without irritation or moisture buildup.
Styles and sizing options
You can choose from basic briefs, period underwear, and maternity bras, with styles that cover different needs across different life stages. The brand offers standard sizing ranges that accommodate most body types.
Price range in Australia
Individual pieces typically cost between $24 and $38, positioning them in the mid-range for sustainable underwear. Your purchase price includes the social impact of providing underwear to women who need it.
5. Mighty Good Basics
Mighty Good Basics operates from Sydney with a singular mission to create what they call the world’s most ethical underwear. This Australian brand stands out among the best sustainable underwear brands through their exceptional transparency, naming every facility in their supply chain publicly on their website. You get access to detailed information about where and how your underwear is made, which remains rare in the intimate apparel industry.
Overview and standout features
You benefit from Mighty Good Basics’ commitment to complete transparency about their production process. The brand names every supplier and facility involved in creating their pieces, giving you full visibility into their operations. Their straightforward approach to ethical manufacturing means you can verify their claims about fair-trade production and sustainable materials without digging through vague corporate language.
Sustainability and materials
Mighty Good Basics creates their entire range from GOTS certified organic cotton with only a small amount of elastane for stretch and durability. The brand works exclusively with fair-trade certified factories in India, ensuring ethical labour practices throughout production. Their focus on low-impact sustainable fibres means you get underwear that meets genuine environmental standards rather than greenwashing marketing claims.
GOTS certification guarantees organic cotton production without harmful pesticides or synthetic fertilisers throughout the supply chain.
Comfort, fit and support
The organic cotton fabric delivers reliable comfort for daily wear without irritation or synthetic materials against your skin. You experience a substantial feel that holds up through regular washing while maintaining shape and support.
Styles and sizing options
Mighty Good Basics offers men’s and women’s underwear in various cuts that prioritise function over fashion. Their range includes different rises and coverage options with basic colour selections that work under any clothing.
Price range in Australia
Individual pieces cost between $18.50 and $24.50, making Mighty Good Basics one of the most affordable sustainable options available. Your purchase supports ethical manufacturing while staying within a reasonable budget for everyday underwear.
6. Bushy
Bushy delivers Australian-made underwear crafted from sustainable eucalyptus fibres with a focus on local manufacturing and complete transparency. This brand stands out among the best sustainable underwear brands by producing every piece within Australia, supporting local workers while maintaining environmental standards. Their commitment to domestic production means shorter supply chains and a smaller carbon footprint compared to imported alternatives.
Overview and standout features
You get underwear manufactured entirely in Australia, with Ethical Clothing Australia certification backing their labour practices. Bushy publishes detailed supply chain information on their website, showing you exactly where materials come from and how each piece is made. Their focus on transparency extends to naming specific factories and outlining worker conditions, which remains uncommon in the underwear industry.
Sustainability and materials
Bushy creates their entire range from TENCEL™ Modal, a natural cellulose fibre sourced from sustainably harvested eucalyptus trees. The trees carry FSC© certification, guaranteeing responsible forestry practices throughout the supply chain. This material choice delivers exceptional softness while maintaining a lower environmental impact than conventional cotton production.
TENCEL™ Modal from certified eucalyptus forests provides a sustainable alternative that supports responsible land management.
Comfort, fit and support
The eucalyptus-based fabric delivers exceptional softness that stays comfortable throughout extended wear. You experience natural breathability that helps regulate temperature and manage moisture during Australian conditions.
Styles and sizing options
Bushy offers bikini briefs, thongs, shorts, and crop tops for women, with designs that prioritise function. Their range includes basic colour options that work under different clothing types.
Price range in Australia
Individual pieces typically cost between $28 and $42, reflecting the Australian manufacturing and premium materials used throughout their production.
7. The Very Good Bra
The Very Good Bra creates completely compostable underwear and bras that break down naturally when you’re done with them. This Australian brand stands among the best sustainable underwear brands by achieving zero-waste certification on their titular bra, with their entire range now following the same principles. Their B Corp certification backs their commitment to environmental and social responsibility across every aspect of production.
Overview and standout features
You get underwear that can literally return to the earth when it reaches the end of its life. The Very Good Bra earned recognition for creating the world’s first fully compostable bra, with testing showing complete decomposition within 180 days in proper composting conditions. Their exceptional transparency extends to publishing detailed information about materials, factory locations, worker conditions, and even energy usage at production facilities.
Sustainability and materials
The brand creates every piece from Tencel™ Lyocell, a fabric made from sustainably farmed eucalyptus trees using environmentally responsible production methods. You benefit from material that requires minimal water during manufacturing compared to conventional cotton. Their commitment to compostability extends beyond the fabric to include biodegradable thread and plant-based elastics throughout each piece.
Tencel™ Lyocell production uses closed-loop systems that recapture and reuse processing solvents, significantly reducing environmental impact.
Comfort, fit and support
The Tencel fabric delivers exceptional softness against your skin while maintaining natural breathability. You experience comfortable support without underwires or synthetic materials, making their pieces suitable for extended daily wear.
Styles and sizing options
The Very Good Bra offers their signature wireless bra alongside high-leg briefs, big knickers, and sleepwear options. Their range focuses on comfort-first designs with basic colour selections that work under different clothing.
Price range in Australia
Individual bras typically cost around $60, while underwear pieces start at $28. Your purchase includes the peace of mind that comes from genuinely compostable products backed by transparent manufacturing practices.
8. Lela Organic
Lela Organic prioritises vaginal health as the foundation of their underwear design, recognising that synthetic fabrics contribute to irritation and infections. This Australian brand creates GOTS-certified organic cotton underwear specifically designed to maintain the natural balance your body needs. Their focus on health-first design makes them a standout among the best sustainable underwear brands available in Australia today.
Overview and standout features
You get no-nonsense underwear that addresses the direct link between fabric choice and intimate health. Lela Organic built their entire range around the understanding that synthetic materials trap heat and moisture, creating conditions that lead to thrush and yeast infections. Their commitment to breathable natural fibres means you avoid the irritation and imbalance that synthetic underwear causes.
Sustainability and materials
The brand uses GOTS-certified organic cotton exclusively, guaranteeing production without harmful pesticides or synthetic chemicals. You benefit from fabric that meets rigorous environmental and social standards throughout the entire supply chain. Their organic cotton choice eliminates exposure to the toxic compounds found in conventional cotton production.
GOTS certification ensures organic cotton production maintains environmental standards while protecting both workers and wearers from harmful chemicals.
Comfort, fit and support
Lela Organic’s organic cotton fabric delivers soft, lightweight comfort that works for everyday wear without irritation. You experience natural breathability that helps maintain proper pH balance and moisture levels, reducing your risk of infections and discomfort.
Styles and sizing options
Their range focuses on practical everyday styles with basic cuts that prioritise function and comfort. You can select from various rise options with simple colour choices that work under any clothing.
Price range in Australia
Individual pieces typically cost between $22 and $32, making Lela Organic an accessible option for organic cotton underwear that prioritises your intimate health.
9. Knobby
Knobby brings Queensland-born creativity to sustainable underwear with a focus on vibrant prints and innovative recycled materials. This Australian brand rejects boring basics by offering colourful special edition designs alongside their core range, giving you sustainable underwear that adds personality to your drawer. Their combination of recycled plastics, plant-based fibres, and local manufacturing for select pieces makes them a distinctive choice among the best sustainable underwear brands available in Australia.
Overview and standout features
You can purchase Knobby pieces individually online or join their subscription club for regular deliveries. Their standout feature is the extensive print collection featuring everything from bold graphics to playful patterns, all designed to brighten your day. The brand offers both men’s and women’s styles with various cuts that work for different preferences.
Sustainability and materials
Knobby creates their range from three primary sustainable materials. You get BottleBlend®, which transforms plastic water bottle waste into wearable fabric. Their Tencel pieces use biodegradable fabric made from sustainably sourced beechwood. The premium Australian merino wool collection stands out as locally made within Australia, supporting domestic manufacturing while delivering natural performance benefits.
BottleBlend® technology diverts plastic waste from landfills and oceans while creating comfortable, durable underwear fabric.
Comfort, fit and support
The varied material options deliver different benefits depending on which you choose. You experience natural temperature regulation from merino wool, moisture-wicking properties from Tencel, and reliable durability from BottleBlend®.
Styles and sizing options
Knobby offers multiple cuts for both men and women with various rises and coverage levels. Their colourful special edition prints rotate regularly, giving you fresh design options beyond standard basics.
Price range in Australia
Individual pieces typically cost between $25 and $38, with subscription options reducing the per-piece cost through regular deliveries.
10. Thunderpants
Thunderpants delivers New Zealand-made comfort with a focus on organic cotton and eye-catching prints that challenge boring underwear conventions. This brand creates full-brief styles that prioritise function while offering designs ranging from classic flower power to playful bananas and rockets. Their commitment to ethical manufacturing within New Zealand means you support fair labour practices while getting underwear that works for the whole family.
Overview and standout features
You get access to locally illustrated prints created by New Zealand artists, giving each pair a unique personality that stands out in your drawer. Thunderpants names all production facilities in their supply chain, from the textile mill producing organic yarn to the local factory where garments are assembled. Their transparency extends to detailing sustainable practices at every stage while maintaining a focus on continuous improvement across their operations.
Sustainability and materials
The brand creates their entire range from organic and Fairtrade cotton that meets genuine certification standards throughout production. You benefit from fabric produced without harmful pesticides or synthetic fertilisers, protecting both workers and the environment. Thunderpants recently transitioned to a Los Angeles-based mill for some fabrics, reducing shipping distances while maintaining their commitment to ethical sourcing.
Fairtrade certification guarantees fair wages and safe working conditions for every worker involved in cotton production.
Comfort, fit and support
The full-brief design hugs your hips comfortably while providing substantial coverage that works under different clothing types. You experience reliable support without tight elastic cutting into your waist or legs throughout the day.
Styles and sizing options
Thunderpants offers their Original style alongside options for men, women, and children with various artist-designed prints that rotate seasonally.
Price range in Australia
Individual pieces typically cost between $26 and $35, with international shipping adding to the final cost for Australian customers.
Key takeaways
The best sustainable underwear brands in Australia prioritise natural fibres, ethical manufacturing, and genuine transparency about their production practices. You’ll find options across different price points, from budget-friendly basics at $18.50 to premium pieces at $60, with most brands offering mid-range pricing between $25 and $38 per piece. Your choice depends on your priorities, whether that’s compostable materials, local manufacturing, specific health benefits, or direct social impact through purchase donations.
Australian-made options like SLY Collective and Bushy support domestic manufacturing while reducing shipping emissions through shorter supply chains. Brands using bamboo, Tencel, and organic cotton deliver comfort without synthetic materials that trap heat and moisture against your skin. Most offer multi-pack options that reduce the per-piece cost while helping you transition your entire underwear drawer to sustainable alternatives.
Ready to make the switch? Check out SLY Collective’s range of bamboo pouch underwear for Australian-designed comfort that eliminates chafing while supporting environmental responsibility.
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