Thigh rub, ride-up and swampy days can ruin a run, a shift on site or a long flight. If your trunks creep, bunch or leave seams rubbing raw, it’s time to graduate to men’s long leg underwear. Longer legs add coverage where you need it most, gripping the thigh to stop roll-up and cut out chafe, while modern pouch designs keep everything separated and supported. Add breathable bamboo or fast-dry microfibre and you get cooler temps, fewer adjustments and a cleaner line under shorts and pants (ideal for Aussie heat, humidity, training sessions and all-day wear).
In this guide we’ve rounded up 12 of the best long-leg options you can buy in Australia, from homegrown favourites to performance heavyweights. For each pick you’ll see the standout features, who it suits, fabric and leg length, plus price and AU sizes. Expect bamboo heroes (SLY Collective, Step One), dependable staples (Bonds, Tradie, Jockey, Underworks) and premium tech from Lululemon, Under Armour, BN3TH and SAXX. Some add a stash pocket. Ready to stop chafe and find your fit? Let’s get into the list.
1. SLY Collective men’s bamboo long leg boxer briefs
Designed in Australia for comfort first, SLY Collective’s bamboo long leg boxer briefs are men’s long leg underwear that fix the two biggest pain points: chafe and ride‑up. The built‑in ball pouch keeps you separated and supported, bamboo breathes to regulate heat, and a nifty pocket handles a key, card or passport on the go.
Standout features
Key wins:
- Built‑in ball pouch: separation and structure stop skin‑on‑skin and chafing.
- Long‑leg cut: grips the thigh to prevent ride‑up and bunching.
- Bamboo comfort: soft, breathable and temperature‑regulating.
- Nifty pocket: stash a key, card or passport—great for travel.
Best for
A smart pick when you want:
- Chafe‑free daily wear.
- Hot, humid days, long shifts and travel.
- Extra thigh coverage without adjustments.
Fabric and leg length
Made from bamboo fabric that breathes and helps regulate temperature, with a long‑leg cut that sits securely on the thigh to stop roll‑up.
Price and sizes (AU)
Buying is simple:
- Comfort Guarantee: refund on your first pair.
- Free size exchanges.
- Free shipping over $100 in AU.
See the SLY Collective website for current pricing and AU sizes.
2. Step One men’s bamboo long boxer briefs
Step One’s long boxer briefs are a crowd favourite for men’s long leg underwear, thanks to super‑soft bamboo viscose and Ultraglyde™ that cuts friction where thighs rub. The longer leg keeps fabric anchored so it won’t bunch on runs, during gym sessions or under work pants, and the breathable knit makes them an easy all‑day option. With over 50K+ 5‑star reviews backing the comfort, they’re a safe bet if you’re switching from short trunks that ride up.
Standout features
Here’s what stands out:
- Super‑soft bamboo viscose for breathable comfort.
- Ultraglyde™ friction‑reducing tech to curb thigh rub.
- Long leg cut to minimise ride‑up and chafing.
- Backed by 50K+ 5‑star reviews.
Best for
Good pick if you want:
- Extra thigh coverage to stop chafe on runs and commutes.
- Cooler, softer feel than heavy cotton.
- A reliable everyday pair that won’t need constant readjusting.
Fabric and leg length
Step One uses bamboo viscose with a smooth handfeel, and builds in Ultraglyde™ to reduce rubbing. This is the brand’s long boxer/long leg silhouette, giving more thigh coverage than standard trunks.
Price and sizes (AU)
Available in AU sizes; pricing depends on colour and style. Check the Step One site for current availability and pricing in Australia.
3. Bonds Guyfront long leg trunks
If you want a simple upgrade from short trunks, Bonds’ Guyfront long leg trunks add thigh coverage with fewer adjustments. Part of Bonds’ long leg range and easy to grab in Australia through Bonds and retailers like BIG W, they’re a straightforward everyday pick for men’s long leg underwear.
Standout features
Everyday comfort with longer coverage and easy availability:
- Long‑leg profile to help stop ride‑up and reduce thigh rub.
- Widely available in Australia, including major retailers like BIG W.
Best for
Best when you want long‑leg coverage without fuss:
- Everyday wear under jeans, chinos and work pants.
- Switching from short trunks to men’s long leg underwear for less chafe.
Fabric and leg length
Listed in Bonds’ Long Leg category, this silhouette sits further down the thigh than the brand’s mid or short leg trunks to help it stay put.
Price and sizes (AU)
Pricing and sizes vary by retailer and style in Australia.
- AU sizing available via Bonds and major retailers like BIG W.
- Check current price and stock directly with your preferred retailer.
4. Tradie No Chafe long leg trunks
Tradie’s No Chafe long leg trunks keep things simple: cut the rub, keep legs put. From the No Chafe range, the longer leg gives extra coverage that stays steady under work shorts, footy kits or chinos. Easy to find nationwide (including BIG W) with 14‑day returns online.
Standout features
What stands out:
- No Chafe design: Built to reduce inner‑thigh friction.
- Longer leg cut: Extra coverage helps prevent ride‑up.
- Easy to buy: Stocked in Australia; 14‑day returns online.
Best for
Where it shines:
- On‑site shifts and training: Stays put when you move.
- Everyday wear: Reliable men’s long leg underwear.
Fabric and leg length
Choose the long leg trunk in the No Chafe range for deeper thigh coverage and a stay‑put feel; fabric blends vary by style.
Price and sizes (AU)
AU sizes via Tradie and major retailers like BIG W; pricing varies by colour and pack—check current ticketed prices where you shop.
5. Knobby men’s long trunks
Knobby’s long trunks deliver exactly what the name promises: coverage and comfort when short trunks creep. The longer cut anchors on the thigh to help reduce ride‑up and thigh rub, keeping adjustments down on busy days. With free 30‑day returns, trying a long‑leg fit is low‑risk.
Standout features
Highlights at a glance:
- Long trunk silhouette: Extra thigh coverage for a stay‑put fit.
- Coverage & comfort focus: The collection leans into exactly that.
- Free 30‑day returns: Easy to try and swap if needed.
Best for
Suited to:
- Everyday wear: Longer coverage with fewer adjustments.
- Training, commuting, site shifts: Helps curb ride‑up and rub.
- First move into men’s long leg underwear: Low‑risk fit check.
- Travel days: Reliable, no‑fuss coverage.
Fabric and leg length
Sold as long trunks, they sit deeper on the thigh than standard trunks for stay‑put coverage; fabric composition varies by style within the range. Select the long option for maximum coverage in Knobby’s men’s lineup.
Price and sizes (AU)
AU sizes and colours vary by style; pricing depends on the specific long trunk you choose. Free 30‑day returns apply for peace of mind.
6. Mitch Dowd comfort long leg trunks
Mitch Dowd’s Comfort Long Leg Trunks do what the label says: prioritise comfort with a longer cut that stays put. If your regular trunks ride up mid‑commute or mid‑set, the added thigh coverage helps the fabric anchor while reducing rub. A straightforward, everyday men’s long leg underwear option with stress‑free 30‑day returns if you want to try the longer fit.
Standout features
- Long‑leg trunk silhouette: Extra thigh coverage to help minimise ride‑up and rubbing.
- Comfort‑led range: Part of the Comfort Long Leg Trunks collection.
- 30‑day returns: Easy to trial and swap if needed.
Best for
- Everyday wear: Under jeans, chinos or work pants.
- Switching from short trunks: Less chafe and fewer adjustments.
- Commutes and light training: Coverage without fuss or bulk.
Fabric and leg length
Listed within Mitch Dowd’s Comfort Long Leg Trunks collection, the long‑leg cut sits deeper on the thigh than standard trunks to help it stay put. Fabric composition varies by style—check the specific product details for the exact blend.
Price and sizes (AU)
- AU sizes available; sizing depends on the style.
- Pricing varies by colour and design; confirm current pricing on the brand site.
- 30‑day returns apply for peace of mind.
7. Jockey microfibre long leg trunks
Jockey’s microfibre long leg trunks bring a slick, quick‑dry feel that handles sweat, heat and movement without getting heavy. If cotton runs hot on you, this lightweight option stays smooth under shorts, suiting and gym gear, while the longer leg anchors to your thigh to tame ride‑up. A solid, sportier everyday choice in men’s long leg underwear.
Standout features
Why they make sense:
- Quick‑dry microfibre: Lighter, cooler and dries faster than cotton.
- Long‑leg cut: Extra coverage to reduce ride‑up and thigh rub.
- Low‑bulk finish: Smooth under slim pants and activewear.
Best for
Reach for these when you need:
- Warm, humid days and training sessions.
- A slick alternative to heavier cotton.
- All‑day comfort for work, travel and commutes.
Fabric and leg length
Built in a stretch microfibre blend for a close, supportive feel. The long‑leg trunk silhouette sits further down the thigh than standard trunks to help it stay put and minimise chafe.
Price and sizes (AU)
Pricing and availability vary by retailer in Australia, with standard AU sizing. Check current stock, colours and pack deals where you shop.
8. Underworks men’s long leg trunks (Big W)
Underworks long leg trunks are a no‑fuss pick you can grab at BIG W. The longer cut adds thigh coverage to curb ride‑up and rubbing, making them a simple upgrade from short trunks. With BIG W stocking Underworks, they’re easy to find and replace.
Standout features
Key wins:
- Long leg cut: helps prevent ride‑up and inner‑thigh chafe.
- Easy to buy: available via BIG W’s men’s trunks range.
Best for
Good for:
- Everyday wear: under work pants, shorts and gym gear.
- A simple upgrade: accessible men’s long leg underwear option.
Fabric and leg length
Fabric blends vary by style; choose the Underworks long‑leg trunk silhouette for deeper thigh coverage and a stay‑put feel.
Price and sizes (AU)
Available in AU sizing at BIG W; pricing varies by style—check current price online or in‑store.
9. Lululemon Always In Motion 7-inch boxer
If you want men’s long leg underwear with a premium finish, Lululemon’s Always In Motion 7‑inch boxer adds a deeper inseam to curb ride‑up without bulk. It’s an all‑day pair that moves from commute to gym to long‑haul flights with smooth comfort and steady support.
Standout features
What stands out:
- 7‑inch inseam: deeper thigh coverage to minimise ride‑up.
- Smooth, lightweight feel: comfortable under jeans or activewear.
- Stay‑put fit: longer leg and supportive build keep fabric anchored.
Best for
Reach for these when you want:
- Long days on the move: commuting, travel, back‑to‑back meetings.
- Light training and studio classes where stretch matters.
- A longer leg that sits cleanly under slim pants and running shorts.
Fabric and leg length
Built in a smooth, stretchy knit with a supportive feel. The 7‑inch leg sits mid‑thigh on most, adding stay‑put coverage to help prevent roll‑up.
Price and sizes (AU)
In Australia:
- AU sizing via Lululemon stores and online.
- Pricing varies by colour/season; check current stock before you buy.
10. Under Armour Boxerjock 9-inch boxer briefs
Under Armour’s Boxerjock 9‑inch boxer briefs bring a performance‑first take on men’s long leg underwear. The deeper inseam anchors to your thigh to curb ride‑up, while the smooth, lightweight stretch knit pulls sweat off the skin and dries quickly. The close, supportive fit sits clean under gym shorts and work pants, keeping you focused when the tempo lifts.
Standout features
Why they make sense on and off the field:
- 9‑inch inseam: deeper thigh coverage to help them stay put.
- Performance knit: lightweight, sweat‑wicking feel that dries fast.
- Stretch support: moves with you without bunching or bulk.
- Smooth finish: low‑profile feel under slim pants and training gear.
Best for
Reach for these when:
- High‑movement training, running, team sport days.
- Hot, humid conditions where quick‑dry matters.
- Extra coverage under lined shorts or workwear.
Fabric and leg length
Built from a smooth, stretchy performance knit designed to manage moisture, with a 9‑inch leg that sits lower mid‑thigh on most to minimise roll‑up and rubbing.
Price and sizes (AU)
Available widely in Australia in standard AU sizing.
- Pricing varies by retailer, colour and packs; check current ticketed prices.
- Stock and colours rotate seasonally; confirm availability before you buy.
11. BN3TH Classic long boxer briefs
BN3TH’s Classic Long Boxer Briefs bring a premium-feel take on men’s long leg underwear, with a deeper inseam that grips the thigh and shuts down ride‑up when you’re on the move. The close, supportive cut keeps everything in place without bulk, sitting smooth under jeans, gym shorts and suiting. If you want extra coverage with a polished, everyday feel, this is a reliable pick for long shifts, travel and training days.
Standout features
- Long‑leg silhouette: Anchors on the thigh to reduce ride‑up and chafe.
- Smooth, stretchy fabric: Soft handfeel and breathable comfort for all‑day wear.
- Supportive front shape: Holds position to cut down on mid‑day adjustments.
- Low‑profile finish: Clean seams and waistband sit flat under slim pants and activewear.
Best for
- All‑day comfort: Commutes, office hours and long‑haul flights.
- Warm conditions and workouts: Stays smooth as you heat up and move.
- Layering cleanly: Minimal bulk under chinos, denim and training gear.
Fabric and leg length
Built from a soft, stretchy knit for a smooth, supportive feel. The long boxer brief cut sits further down the thigh than standard trunks, adding stay‑put coverage that helps prevent roll‑up and inner‑thigh rubbing.
Price and sizes (AU)
- Availability and pricing vary by retailer in Australia.
- Standard AU sizing; size and colour options depend on the specific style.
- Check current stock and ticketed prices with your preferred retailer before you buy.
12. SAXX Vibe long leg boxer briefs
SAXX’s Vibe Long Leg Boxer Briefs give a stay‑put, deeper‑thigh fit that shuts down ride‑up without bulk. The smooth, lightweight stretch fabric keeps things cool and comfortable from commute to weekend sessions, while the supportive shape holds position so you can forget about fidgeting. A polished, everyday option in men’s long leg underwear.
Standout features
- Long‑leg silhouette: reduces ride‑up and inner‑thigh rub.
- Smooth, lightweight stretch: breathes and dries quickly.
- Low‑profile support: sits flat under jeans and gym gear.
Best for
- All‑day wear and travel: steady comfort in warm conditions.
- Light training and studio sessions: moves without bunching.
- Upgrading from short trunks to men’s long leg underwear.
Fabric and leg length
Built from a soft, stretchy knit with a close, supportive feel. The long leg sits deeper on the thigh to help it stay put and minimise chafe.
Price and sizes (AU)
- Available in Australia in standard AU sizing; colours and prints rotate.
- Pricing varies by retailer and collection—check current ticketed prices before you buy.
Conclusion section
You’ve now got the shortlist. The right long leg will lock down ride‑up, cut thigh rub and sit smooth under shorts and pants. Match fabric to your life: breathable bamboo for all‑day comfort, quick‑dry microfibre for sweaty sessions, and supportive pouch designs when separation matters. If you run, work on site or live in humid weather, upgrading from short trunks to a longer cut is the simplest fix—fewer midday adjustments, cooler temps and better comfort from desk to dumbbells to departures.
For an Australian‑designed option that bundles the lot—built‑in ball pouch, temperature‑regulating bamboo, a longer leg that stays put and a nifty pocket for travel—start with SLY Collective. Their Comfort Guarantee on your first pair, free size exchanges and free shipping over $100 in Australia make it an easy upgrade. Choose your size, pull them on and let your men’s long leg underwear handle the miles while you get on with your day.