Extremely Comfortable
"So comfortable on first spin I forgot to concentrate on they felt. Perfect fit, roomy pouch. Will buy another pair"
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Black
Refined Multi-Award Winning Design.
The Trail Liner Short is the next evolution of our North Shore Bike Liner. Designed to be worn underneath your favourite shorts or pants, this next generation update features BN3TH’s first-of-its-kind, patented MTB pad seamlessly integrated with our Original 3D Pouch, keeping everything separated, supported, and secure on every ride.
Built with a breathable 4-way stretch mesh, the Trail Liner delivers exceptional moisture-wicking performance and all-day comfort. Finished with Ionic+® anti-odour technology, it stops odour before it starts, so you can ride harder and longer with confidence.
Body Fabric: 89% Recycled Polyester 11% Spandex
2-Layer 3D Pad Materials: 50kg/3mm foam base with a breathable perforated backing, follow by a performance 80kg/10mm foam with a moisture wicking and anti-microbial top fabric.
SHORT FEATURES
CHAMOIS FEATURES
Free standard shipping is available on all orders above $75 (after discounts and before taxes).
All available shipping options will be visible at checkout. We ship orders within 1-2 business days, but this can increase during promotional periods.
Returns or exchanges will be processed up until January 31, 2026 for items purchased at a discount of less than 30% between November 8 and December 26, 2025. Products discounted by 31% or more will be final sale. For more information, check out our Frequently Asked Questions page.
A liner that delivers breathable, supportive performance with an integrated MTB pad.
ORIGINAL 3D POUCH
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Separates and supports for next-level comfort.
Support
UNDER-SHORT ESSENTIAL
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Smooth fabric with chafe free flatlock stitching.
Friction-Free
MESH FABRIC
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Breathable, moisture wicking mesh fabric.
Breathable
IONIC+® TECHNOLOGY
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Eliminate odour-causing bacteria and microbes
Anti-Odour
Features That Perform
4-WAY STRETCH
Lightweight, 4-way high stretch mesh fabric, with antimicrobial anti-odour technology.
SILICON GRIPPER
Clean cut hem with dot matrix silicon gripper to prevent riding up.
NO-ROLL WAISTBAND
Secure no-roll elastic waistband made with recycled materials.
ENGINEERED COMFORT
WHY WE MADE THIS
SUSTAINABILITY MATTERS
Overall rating: 4.770758 / 5 from 554 reviews.
AI Generated Review Summary
The Trail Liner Short by BN3TH offers a refined design with a patented MTB pad and 3D pouch for separation and support. It features a breathable mesh fabric with moisture-wicking properties and anti-odour technology, ensuring comfort and freshness during rides. Customers praise its comfort, fit, and quality.
Summary topics
- Comfort (4%): Customers expressed appreciation for the softness and comfort of the Bn3th padded underwear.
- Quality (7%): Customers expressed appreciation for the BN3TH liner, stating it is the best they have ever used.
- Padding Comfort (11%): It was observed by customers that the padding on these shorts is great and provides a perfect amount of comfort.
- Pouch Comfort (4%): It was highlighted by customers that the pouch is great and very comfortable, making it a saver for long rides.
- Chamois Comfort (24%): A significant amount of customers expressed appreciation for the great fitting and comfort of these chamois.
Review topics: ["size","fit","feel","problem","length","look","fabric","colour","material","quality","movement","shipping","comfort","style","pockets","pants","design","value","padding","pair","boys","butt","difference","chamois","stitching","construction","snug","shorts","performance","durability"].
Review highlights
- "Really happy with great comfort, deadly quality and support." —
- "I like it , good fit, very comfortable and high quality ." —
- "Super confort and functional padding comes at a higher price...worth it!" —
Reviews
Comfortable. . . doesn't feel like a diaper!
"These liners fit nicely, the perfect amount of being tight/snug to keep them from slipping while riding without leaving branded markings in your skin. The padding itself has a good density to it to make saddle time comfortable, yet its shape and design allows it to fit appropriately without feeling like a bulky diaper."
Very comfortable, but some special care needed
"These bike shorts are VERY comfortable. I wear mine mountain biking and I love them. The pouch in the front keeps everything where it should be and lets me focus on my riding. The padding is nice in the saddle, but a bit annoying for walking around in. The silicone in the thighs keeps them from riding up, but I have felt some stitching pop when I'm pulling them up. I try to be gentle when I'm putting them on because of that. I accidentally threw them in the wash on a heavy duty cycle that must have used hot water once and the padding delaminated and folded over on itself. I was able to unfold it and I haven't had any issues since, but the foam padding is now looser in in it's pouch (not laminated like they were when new). I never put them in the dryer before, but I would avoid any heat when washing these shorts."
Trail Bike Liner Shorts
"Great shorts , comfortable and have great movement in them. Highly recommend these shorts. Price point is good."
BN3TH biking shorts
"Biking shorts are as advertised. Very supportive and great quality."
Best comfort for MTB
"The padding and the cradle for the boys along with the material and fit of these liner shorts are 5 stars. I own and still use the previous generation of these, but the new ones are definitely an upgrade. Get em!"
"Great service and good quality product."
Better than I tought
"The fit confort and durability are excellent. I highly recommend"
Incredible Bike Shorts
"This is the second pair I have owned. First pair lasted for 5 years and I ride a lot. Very comfortable Very durable"
"It's a good quality product! Very comfortable and efficient! Strongly recommended!"