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Undergarments

Control your climate with Bontrager baselayers.

Available in multiple fabric weights, each with its own unique construction, and each designed for moisture-wicking, quick-drying, and 4-way stretch mobility, Bontrager baselayers provide the specific thermal performance you need to stay comfortable, no matter how intense your ride or varied the conditions.

Gore Wear Base Layer Singlet
$23.99 $39.99 40% Savings
Gore's Base Layers are made of a light moisture-transferring fabric with non-chafing flatlock seams and an anatomic cut for excellent comfort and freedom of movement.
Bontrager Troslo inForm Cycling Liner Short
$69.99
The Troslo inForm short is unlike any cycling liner short you’ve seen before. Dual hip pockets easily hold a variety of essentials, while comfortable mesh ventilation and supportive compression materials fight fatigue to make this the ultimate liner to go under your shorts and prevent chaffing. Key features - Troslo inForm BioDynamic Chamois - comfortable, dimension-optimized cycling pad - Two pockets on legs for nutrition wrappers or lip balm - Profila Power main materials with strategically placed Profila Cool inserts - Clean cut compression leg gripper - Flexible fit waistband for superior comfort - 9.5" (24cm) inseam - Fitted cut provides streamlined body fit for enhanced performance
Pearl Izumi Men's Transfer Sleeveless Base Layer
$45.00
This cycling specific summer weight baselayer is designed to keep you cool and comfortable even on hot days. P.R.O. Transfer mesh fabric facilitates the evaporative process by rapidly moving moisture away from your skin to outer layers. In back, more open mesh panels maximize ventilation. Wear this baselayer under a short sleeve jersey during the heat of summer, and then add it to your cool weather layering system in spring or fall. - P.R.O. Transfer mesh fabric provides optimal moisture transfer for quick dry performance - Cycling specific, close to body, anatomic fit - Soft merrow seams for next to body comfort - Body: 100% polyester   - Garment Weight (Size M): 65g
Smartwool Women's Merino 250 Base Layer 1/4 Zip
$100.00
Smartwool's best selling, and warmest, base layer, just got a little more refined with an improved fit, chafe-free seam construction and panels that offer more comfort with a pack. - Slim Fit - Interlock knit - 8" (20 cm) center front zip - Back body seam wraps to front for body enhancing fit - Shoulder panels eliminate top shoulder seams - Flatlock seam construction is designed to eliminate chafing - Knit in Vietnam: 100% Merino Wool - Garment Weight: 230 g = 8.1 oz - Style: SW0NP221
Craft Active Windstopper Crew Neck LS Base Layer
$85.00
Craft's Windstopper Long Sleeve Crew features Gore Windstopper Piuma 4-way-stretch fabric in the chest and keeps the core warm by blocking wind. • Gore Windstopper Piuma four-way-stretch fabric • Windstopper windblock front • Pro Zero Fabric • Flat Lock Stitching • Drop Tail • Unisex (sizing based on Men's) • Machine washable and dryable
Pearl Izumi Women's Transfer Wool Short Sleeve Base Layer
$80.00
Pearl's Transfer Wool Short Sleeve Base Layer is the best piece to have next to your skin as part of a layering system for riding in damp or wet conditions. This baselayer combines high quality Merino wool and moisture-wicking polyester in a strategic blend for exceptional performance. Its cycling specific shape, thumb loops if you need to seal in the warmth, and soft merrow seams create a comfortable foundation for cold weather and changing conditions. • P.R.O. Transfer Dry Merino provides optimal moisture transfer, dry time and odor absorption • Cycling specific fit with rotated sleeve construction • All–season versatility • Anatomic ‘close–to–body’ fit
Craft Craft Active Extreme 2.0 CN LS
$79.99
- Thin, lightweight and elastic fabric that is channel-knitted to trap air and provide warmth - Body-mapped mesh for optimal temperature regulation - Flatlock seams that follow body movements - Fabric 1: 100% Polyester - Fabric 2: 96%, 4% Elastane
Craft Active Extreme 2.0 CN SS
$74.99
- Thin, lightweight and elastic fabric that is channel-knitted to trap air and provide warmth - Coolmax-Air fiber against the skin enhances cooling and moisture transport - Body-mapped mesh for optimal temperature regulation - Flatlock seams that follow body movements - Fabric 1: 100% Polyester - Fabric 2: 96%, 4% Elastane
Craft Active Extreme 2.0 CN SS
$74.99
- Thin, lightweight and elastic fabric that is channel-knitted to trap air and provide warmth - Coolmax-Air fiber against the skin enhances cooling and moisture transport - Body mapped mesh for optimal temperature regulation - Flatlock seams that follow body movements - Fabric 1: 100% Polyester - Fabric 2: 96% Polyester, 4% Elastane
Club Ride Jewel
$34.99
- Breathable, stretch mesh panels - 5-panel body-shaping construction - Flatlock sewn chamois pad - Wide waistband with soft inside
Louis Garneau Women's 1001 Singlet
$39.99
The women's Singlet 1001 is the piece you won't want to do without, an ideal tool for managing your body temperature. This lightweight base layer acts as a transitory layer between the skin and the cycling jersey. It evacuates moisture even on the warmest days, so you can wear it at all times as a first layer to stay dry, no matter your sport or activity. - Drytex 1001: Enhances airflow and wicks moisture - Flatlock seams - Reflective accent - Racer Fit Extra Lightweight
Pearl Izumi Women's Cargo Baselayer
$60.00
A full mesh baselayer designed to carry ride essentials under a jersey, with Pearl's patented anatomic Speed Sleeve construction to deliver a cycling-specific fit and support your load comfortably through your shoulders. - Direct-Vent mesh fabric for optimal moisture transfer and cooling - Patented anatomic Speed Sleeve design provides anatomically contoured fit in the cycling position, plus spreads the weight of pocket cargo across your shoulders - Three back pockets allow close-to-body storage without bouncing
Pearl Izumi Men's Transfer Wool Short Sleeve Cycling Baselayer
$80.00
The best piece to have next to your skin as part of a layering system for riding in damp or wet conditions. This baselayer combines high quality Merino wool and moisture-wicking polyester in a strategic blend for exceptional performance. A women’s-specific cycling shape, to-the-elbow half sleeve, and soft merrow seams create a warm and comfortable foundation for cold weather and changing conditions. - P.R.O. Transfer Dry Merino provides optimal moisture transfer, dry time and odor absorption - Cycling specific fit with rotated sleeve construction - All–season versatility - Anatomic ‘close–to–body' fit
Pearl Izumi Men's Transfer Long Sleeve Baselayer
$65.00
This cycling-specific summer-weight baselayer is designed to keep you cool and comfortable even on hot days. Transfer fabric facilitates the evaporation process by rapidly moving moisture away from your skin to outer layers, while activated charcoal in the front panel fabric further speeds dry time and cooling. In back, mesh panels maximize ventilation. Speed Sleeve anatomic construction hugs the contours of your shoulders, providing a second-skin fit when in the bent-over riding position. Wear this baselayer under a short sleeve jersey during the heat of summer, and then add it to your cool weather layering system during chillier months. - Transfer Dry fabric provides optimal moisture transfer for quick dry performance - Anatomic Speed Sleeve construction for best shoulder fit in the cycling position - Cycling specific, close to the body - Activated Charcoal integrated into the yarns used in front panels to speed dry time even more - Soft Merrow seams for next to body comfort
Craft Active Comfort RN LS
$49.99
- Soft and elastic baselayer that keeps you dry, warm and comfortable with ergonomic fit and excellent body-temperature management. - Semi-relaxed fit with a soft and ventilating crewneck. - Thin and lightweight warming yarn for optimal thermoregulation. - Excellent moisture transport that keeps your body dry and comfortable - Soft and ventilating crewneck. - Fabric: 70% Polyester / 30% Polyamide
Craft Active Comfort RN LS
$49.99
If you want only one baselayer–one that is comfortable and great looking and offers excellent function–then Active Comfort is probably the best choice you can ever make. This soft and comfortable long-sleeve jersey keeps you dry and warm during all kinds of physical activities and works both as a baselayer in colder conditions and as a training jersey in milder temperatures. The garment comes with ergonomic fit for optimal freedom of movement and seamless design for maximum comfort. In addition, bodymapped fabric structures provide efficient body-temperature management. - Soft elastic jersey that keeps you dry, warm and comfortable - Lightweight and warming yarn for optimal thermoregulation - Excellent moisture transport keeps your body dry and comfortable - Flatlock seams that follow body movements - Fabric: 70% Polyester 30% Polyamide
Craft Craft Cool Mesh Superlight SL
$49.99
- Women's specific design of Craft's Superlight mesh top with big-hole design for superior ventilation/cooling - Designed to keep you cool while exercising - Lightweight, micro polyester mesh fabric with a multi-channel fiber construction that effectively pulls perspiration vapor off the body to keep you cool
Craft Active WS Crewneck LS
$89.99
- Full wind-protection in front - Protects your body in windy conditions - Lightweight Gore Windstopper fabric - Soft and close fit - Fabric: 100% Polyester
Pearl Izumi Men's Cargo Base Layer
$60.00
A full mesh baselayer designed to carry ride essentials under a jersey, with Pearl's patented anatomic Speed Sleeve construction to deliver a cycling-specific fit and support your load comfortably through your shoulders. - Direct-Vent mesh fabric for optimal moisture transfer and cooling - Patented anatomic Speed Sleeve design provides anatomically contoured fit in the cycling position, plus spreads the weight of pocket cargo across your shoulders - Three back pockets allow close-to-body storage without bouncing
Bontrager Trosla Women's Cycling Liner Short
$69.99
When you need a cycling liner with smart integrated storage options and a best-in-class chamois, upgrade to the Trosla Women's liner short. Dual hip pockets easily hold a variety of essentials, while comfortable mesh ventilation and supportive compression materials fight fatigue to make this the ultimate mountain-bike specific liner. Key features - Trosla Women's inForm BioDynamic Chamois - comfortable and dimension-optimized - Profila Power main materials with strategically placed Profila Cool inserts - Storage pockets on legs for nutrition wrappers or lip balm - Clean cut compression leg gripper - Flexible fit waistband for superior comfort - 8" (20cm) inseam - Fitted cut provides streamlined body fit for enhanced performance
Pearl Izumi Women's Transfer Long Sleeve Baselayer
$65.00
This women's-specific cycling baselayer is designed to keep you warm and comfortable on cool to cold days. Transfer fabric rapidly moves moisture away from your skin to the outer layer, while activated charcoal in the front panel fabric further speeds dry time and moisture transport. Speed Sleeve anatomic construction hugs the contours of your shoulders, providing a second-skin fit when in the bent-over riding position. Wear this baselayer under a long sleeve jersey during cooler months, and then add it to your cold weather layering system during chillier months. - Transfer Dry fabric provides optimal moisture transfer for quick dry performance - Anatomic Speed Sleeve construction for best shoulder fit in the cycling position - Cycling specific, close to body, anatomic fit - Activated Charcoal integrated into the yarns used in front panels to speed dry time even more - Soft Merrow seams for next to body comfort
Craft Active Extreme 2.0 Boxer WS
$64.99
These boxers feature elastic Windstopper panels and excellent body-temperature management. - Fabric 1: 100% Polyester - Fabric 2: 92% Polyester, 8% ePTFE
Smartwool Men's Merino 250 Base Layer Crew
$95.00
Smartwool's best selling and warmest base layer just got a little more refined with an improved fit, chafe-free seam construction and panels that offer more comfort with a pack. - Slim Fit - Interlock knit - Crew neck with set-in sleeves - Shoulder panels eliminate top shoulder seams - Flatlock seam construction designed to eliminate chafing - Knit in Vietnam: 100% Merino Wool - Garment Weight: 255 g = 9 oz - Style: SW0NP600
KETL Liner Short
$115.00
As the seasons change and the mercury starts to boil, we tend to take a different approach to our attire on the bike. Less is more. Lighter, more breathable fabrics are a must. Moisture management is key. A good liner short is crucial. Ours is crafted using lightweight, breathable Italian fabric and is designed to be worn under an overshort. It offers just the right amount of compression without being too constricting and features a soft, comfortable waistband that moves with you. -Lightweight, breathable, compressive Italian fabric -Soft and comfortable flat rear waistband -Multi-density EIT mountain-bike-specific chamois -Wide, comfortable leg bands that grip without pinching -Sizes S–XXL
KETL Liner Short
$115.00
As the seasons change and the mercury starts to boil, we tend to take a different approach to our attire on the bike. Less is more. Lighter, more breathable fabrics are a must. Moisture management is key. A good liner short is crucial. Ours is crafted using lightweight, breathable Italian fabric and is designed to be worn under an overshort. It offers just the right amount of compression without being too constricting and features a soft, comfortable waistband that moves with you. -Lightweight, breathable, compressive Italian fabric -Soft and comfortable flat rear waistband -Multi-density EIT mountain-bike-specific chamois -Wide, comfortable leg bands that grip without pinching -Sizes XS–XL
Pearl Izumi Men's Cargo Bib Liner Shorts
$100.00
Many experienced riders have opted for the comfort of road bibs under shell shorts for years. They prefer the feel of a bib, but road shorts are not made to be covered with a durable shell short, and the combination can be warmer than ideal. Enter Pearl Izumi's Cargo Bib Liner Short, which not only improves ventilation versus traditional road shorts, but also adds integrated storage with three rear jersey-type pockets and two lower pockets on the thigh for trail essentials, like water, tools, and spare tubes. The superior ELITE Escape 1:1 Chamois takes saddle comfort to a whole new level. With this ultimate bib liner you can ditch your hydration pack for all but your longest rides. Features: - New Transfer Mesh body fabric provides an amazing next-to-skin feel - Smooth fabric across the front of the legs slides easily under shell shorts and ensures a friction-free pedaling experience - Optimized with superior ELITE Escape 1:1 Chamois - Three pockets on the lower back of the bib, and two thigh pockets for carrying ride essentials - 10” inseam
Pearl Izumi Men's Cargo Liner Shorts
$70.00
Engineered to deliver friction free pedaling, performance, and phenomenal breathability, the Pearl Izumi Men's Cargo Liner Shorts are a must have for serious trail riders. Smooth fabric on the front of the thighs allows the liner to slide easily beneath your shell shorts and the Transfer Mesh main body delivers unbelievable breathability. Thigh pockets near the leg openings can conveniently stash your food, ID, money, or tools. And they are easy to access by flipping up the bottom of your shell short. The superior ELITE Escape 1:1 Chamois takes your saddle comfort to a whole new level. Features: - New Transfer Mesh body fabric provides an amazing next-to-skin feel - Smooth fabric across the front of the legs slides easily under shell shorts and ensures a friction-free pedaling experience - Optimized with the superior ELITE Escape 1:1 Chamois - Two thigh pockets for carrying ride essentials - 10” inseam
Louis Garneau Women's 2004 Pants
$39.99
When practicing winter sports, wearing a very thin first layer of clothing that allows moisture to be evacuated is ideal. The women's 2004 pants are a perfect baselayer to keep you dry all winter. Antibacterial and anti-odor properties make them an ideal complement to the warmer clothes you are wearing over it. The Drytex 2004 fabric dries very quickly to ensure maximum comfort before and during your training session. In addition, if you stop to take a break in a cabin before heading back out into the woods, you'll still be warm and dry to enjoy the rest of your day. - Fabric: Drytex 2004 – 4-way stretchable peach skin fabric that increases air circulation and moisture wicking; antibacterial treatment offering freshness and comfort - Fabric Technology: Moisture management - Seams: Flatlock seams - Visibility Features: Reflective accent - Waist: Elastic - Lightweight
Smartwool Men's Merino 250 Base Layer Crew
$95.00
Smartwool's best selling and warmest base layer just got a little more refined with an improved fit, chafe-free seam construction and panels that offer more comfort with a pack. - Slim Fit - Interlock knit - Crew neck with set-in sleeves - Shoulder panels eliminate top shoulder seams - Flatlock seam construction designed to eliminate chafing - Knit in Vietnam: 100% Merino Wool - Garment Weight: 255 g = 9 oz - Style: SW0NP600
Louis Garneau Women's 4002 Zip Neck
$69.99
As a mid-weight base layer the women's 4002 top is intended for colder conditions. The soft ribbed inner face construction wicks moisture away and creates air pockets that store your body heat. The jersey is designed for training with features such as the overlapping mitts to tuck your hands away from the cold, reflective bindings at the cuffs to make you visible at all times, and a 2-way zip to ventilate your core while keeping your neck warm. - AirFit Mesh: The semi-opaque structure and lightness of the mesh provide comfort, flexibility, and excellent moisture control - Seamless front neck: Adds comfort and ease of movement - Fold-over cuff with thumb loop: Turns into a mitt for increased warmth - 4-way stretchability - Flatlock seams - Reflective accent - BTwo-way 12-inch / 30.5cm zip with mesh insert allows for core ventilation while keeping neck warm - Zip garage: Prevents neck irritation
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