Base Layer Tops

Our popular Classic All-Season Merino Base Layer 1/4 Zip is the perfect base layer for warm or cold weather. This top uses our All-Season-weight Merino fabric wrapped around a nylon core to increase durability, while still keeping the 100% soft, Merino wool you love next to skin. Side seams help minimize chafing while wearing a pack and offer a body-enhancing fit. This base layer is comfortable, powerful, sustainable, and, frankly, do-it-all-able. Features - Fit: Slim - Our slim fit is intended to follow the contours of the body - Our lightweight Merino jersey fabric uses a recycled nylon core while still keeping 100% Merino wool next to skin - Flatlock seam construction and offset shoulder and side seams designed to help increase comfort and minimize chafing - Side seams wrap to front - Size medium center-front zipper: 8" (20 cm) - Made in China: 88% Wool-Merino, 12% Nylon. Exclusive of Decoration.

Our Men's Classic Thermal Merino Base Layer Colorblock Crew features 100% Merino wool made with a flatlock seam construction and offset shoulder and side seams designed for enhanced comfort, breathability , thermoregulation, and odor resistance. From hiking to running and skiing, this base layer brings consistent comfort, plus reliable warmth  and durability, for every winter activity. Features - Fit: Slim - Our slim fit is intended to follow the contours of the body - Fabric helps combine the moisture management, temperature regulation, and odor resistance of 100% Merino wool with interlock knit for comfort - Flatlock seam construction and offset shoulder and side seams designed to help increase comfort and minimize chafing -Side seams wrap to front - Made in Vietnam: 100% Wool-Merino. Exclusive of Decoration.

With floral patterns and even more functionality, the Women's Intraknit™ Thermal Merino Base Layer Pattern Crew is engineered to enhance your performance with lighter weights and a cleaner finish. This Smartwool® base layer is 3D-mapped for a near-custom fit and freedom of movement, while ribbed elbows provide extra flex room. New technology allows us to seamlessly knit mesh ventilation in gender-specific zones designed to help keep your body dry and warm as you zip up and venture out in comfort. Features - Slim Fit - Garment Weight: 180 g = 6.35 oz - Knit in India: 53% Merino Wool, 45% Polyester, 2% Elastane - 3D mapping results in near custom fit and freedom of movement while ribbed elbows provide added durability - Mesh ventilation seamlessly knit in gender-specific zones designed to keep the body dry and comfortable -Engineered construction uses knit structures to enhance performance with lighter weights and cleaner finish - Merino Sport yarn combines the power of Merino with the durability and fast dry times of polyester

Bring comfort to every cold-weather workout in the Men's Active Fleece 1/2 Zip. Designed with a four-way stretch knit fabric for maximum mobility, soft-brushed Merino next to skin for long-lasting comfort, and recycled synthetic materials to protect you against the elements. Features: - Fit: Regular - Our regular fit is intended to help give you room to move without additional bulk - Four-way stretch knit fabric puts soft-brushed Merino next to skin and recycled synthetic material against the elements to help balance comfort and protection - Secure chest pocket - Thumbholes at cuffs - Reflective elements - Size medium center-front zipper length: 11" (28 cm) - Made in Vietnam: Main Body: 47% Polyester, 38% Merino Wool, 15% Elastane. Pockets: 100% Polyester. Exclusive of Decoration.

Bring comfort to every cold weather workout in the Women's Active Fleece 1/2 Zip. Designed with a four-way stretch knit fabric for maximum mobility, soft-brushed Merino next to skin for long-lasting comfort, and recycled synthetic materials against the elements for added protection. Complete with reflective elements, designed for added visibility..

Layer on the comfort with the new Women's Classic Thermal Merino Base Layer 1/4 Zip. This must-have base layer features 100% Merino wool fabric, breathability, odor resistance, and a body-enhancing fit so you can explore comfortably and look good while doing it. Features: - Fit: Slim - Our slim fit is intended to follow the contours of the body - Fabric helps combine the moisture management, temperature regulation, and odor resistance of 100% Merino wool with interlock knit for comfort - Back body seam wraps to front - Raglan sleeves - Flatlock seam construction designed to help increase comfort and minimize chafing - Size 1X center-front zipper: 8.25" (21 cm) - Made in Vietnam: 100% Wool-Merino. Exclusive of Decoration.

Meet the Kari Traa Iselin Long Sleeve, a blend of bold Nordic print and bright colorblocking fun to showcase your style in action. Made from wool/synthetic blend fabrics, the Iselin is designed for premium performance wherever your adventures take you. Slim fit Round neck Superior Warmth: Made with wool fibers that insulate, whether wet or dry Smooth Flatlock Seams: Prevents chafing for all-day wear Contains minimum 40% Responsible Wool Standard (RWS) wool TE-00118857 from farms certified to animal welfare and land-management requirements. Premium Quality: Ultra-soft 19.5 micron Merino wool for a luxurious feel. 150G

Liven up your winter workouts with the Kari Traa Katie Half Zip. Designed for comfort and coverage with a high collar and half zip opening, this base layer will move with you with ease while keeping you cool and dry no matter how much you work up a sweat thanks to Drirelease® Wool. Feature Highlights Slim fit, High collar, drirelease® Wool, Soft handfeel, Warming, Flatlock seams for smooth finish, Half-zip neck opening, Fold up hem, Embroidered logo, 50% or more of this product is made of recycled synthetic materials, IWTO-certified, traceable, non-mulesing Merino wool, , 160G

The Kari Traa Malia Long Sleeve is a slim fitted, round necked baselayer made of a Merino wool/Tencel blend. One of the warmest, fastest drying, and most comfortable baselayers in the Kari Traa family, the Malia has a jacquard knit front and contrasting panels on the back, side, and arms that strategically wick moisture. Derived from the bark of eucalyptus trees, Tencel is renewable and sustainably harvested. Feature Highlights Slim fit, Round neck, Soft handfeel, Warming, Jacquard knit, Flatlock seams for smooth finish, Fold up hem, Embroidered logo, Contains minimum 40% Responsible Wool Standard (RWS) wool TE-00118857 from farms certified to animal welfare and land-management requirements., Contrast fabric contains 50% Tencel™ Lyocell, Main fabric contains 62% Tencel™ Lyocell, 18,5Mic, 210G

Stay warm and dry through all your adventures with the Kari Traa Rose Half Zip. This merino wool base layer in our iconic rose print blends Nordic tradition with comfort and breathability. Stretch fabric mapping allows this top to move with you while the slim fit and flattering lines will make this a new go-to in your wardrobe. Slim fit Wool fibers for supreme isolation, wet or dry Smart fabric mapping for effortless movement Smooth Flatlock Seams: Prevents chafing for all-day wear Zipper Chin Guard: Protects your skin with a soft zip garage Front zip design for optimal ventilation Ethically Made: Crafted from IWTO-certified, traceable, non-mulesing Merino wool Premium Quality: Ultra-soft 19.5 micron Merino wool for a luxurious feel. 240GSM

A showstopping baselayer designed to move with you, the Kari Traa Saga Hood blends bold Nordic inspiration with warm wool comfort. 4-way stretch fabric allows for unrestricted movement while strategic mesh enables ventilation and thumb holes offer cozy comfort. A fixed hood adds extra insulation under a helmet or hat to keep heat in and elements out on the coldest of days.

Soft and functional half-zip tee with few seams and bodymapped structure for enhanced thermoregulation. Recycled fabrics. - Regular fit - Seamless design for optimal freedom of movement - Flatlock seams that follow body movements

Active Extreme X CN LS is a long-sleeve baselayer jersey designed for racing and high-intensity workouts in mild to cold winter conditions. This high-performance garment combines lightweight SEAQUAL polyester, Coolmax Air Technology and recycled polyester to provide exceptional body-temperature management during high-intensity activities. In addition, the garment comes with a waffle-knitted design for enhanced moisture transport and comfort. Great stretch and ergonomic fit ensure optimal freedom of movement while bodymapped mesh panels provide extra ventilation where it's needed the most. A proven favorite among elite athletes and everyday heroes. SEAQUAL eco-friendly fabric The SEAQUAL Initiative challenges plastic pollution and helps to clean our oceans from marine litter, driving society towards circularity. A result of our ambition to take full responsibility for the entire value chain, Active Extreme X CN LS is made of upcycled marine plastics, a 100% recycled material. The recycled SEAQUAL fabric is not only eco-friendly but offers exceptional moisture transport and ventilation as well. Coolmax Air Technology Coolmax Air Technology fabrics are designed to optimize the body's natural temperature management in cold as well as warm conditions. Featuring polyester fibers with a unique propeller-shaped cross-section, the fabric provides excellent thermoregulation for optimal performance. Tests have shown that garments made with the Coolmax Air Technology offer superior body-temperature management, great comfort and superb quick-dry effect. - Thin, lightweight and elastic fabric - SEAQUAL polyester produced from recycled plastic - Coolmax Air Technology - Waffle-knitted design for maximum moisture transport and comfort - Mesh inserts at armpits for enhanced ventilation - Flatlock seams that follow body movements - Tight fit - Moisture transport: 5 out of 5 - Activity level: 5 out of 5 - Temperature: -5 C to +10 C

Bring comfort to every cold weather workout in the Men's Active Fleece 1/2 Zip. Designed with a four-way stretch knit fabric for maximum mobility, soft-brushed Merino next to skin for long-lasting comfort, and recycled synthetic materials to protect you against the elements .

Our most versatile year-round fabric features a nylon core for durability, while keeping soft 100% Merino wool next to skin.

Men's Classic Thermal Merino Base Layer 1/4 Zip to improve functionality while also enhancing aesthetics. As one of our heaviest base layer tops and best base layers for cold weather, this garment uses 100% responsibly sourced Merino wool, shoulder panels, and a flatlock seam construction to help minimize chafing as well as help keep you comfortable and temperature-regulated as you enjoy high-intensity skiing, hiking, running, and more.

We've updated the fit of our Women's Classic Thermal Merino Base Layer 1/4 Zip to improve functionality while also enhancing aesthetics. As one of our heaviest base layer tops and one of our best base layers for cold weather, this garment uses 100% responsibly sourced Merino wool, shoulder panels, and a flatlock seam construction to help prevent chafing as well as keep you comfortable and temperature regulated as you enjoy high-intensity skiing, hiking, running, and more.

This minimalist-style crew is anything but insignificant. Our Women's Intraknit™ Thermal Merino Base Layer Crew is a lightweight, super-moveable top, made for all of your most extreme cold-weather activities. With Merino Sport yarns and gender-specific ventilation perfectly placed to maximize thermoregulation and breathability during high-intensity activities, it helps amplify moisture management, movement, and comfort. When you're in our best base layers, you're ready for anything.