Best S Mens Base Layers in 2026

Chic Design: Button placket and simple look that make this golf polo shirt a go-to for the office or the vacation.

Sweat-Wicking: Wicks away moisture remarkably fast by incorporating soft and breathable fabrics with rapid cooling technology to keep you cool with all-day comfort even when the competition heats up.

All Day Comfort: This men's tennis polo shirt is a comfortable polo shirt.Lightweight, soft and breathable stretchy fabric to give you a cool feeling in the hot summer.

WOOL LEGGINGS FOR MEN: These second skin wool leggings with fly are the perfect foundation for your everyday cold-weather layering system. Insulated, breathable & odor resistant for long days & nights of hiking & camping.

MEN'S LEGGINGS: Wool men's base layer slim fit leggings feature brushed elastic waistband for a comfortable fit & flat-lock seams to reduce chafing. Crafted of 100% merino wool.

MERINO WOOL LAYERS: Stay warm from head to toe in Icebreaker outdoor clothing gear. Keep covered in wool gloves, glove liners, mittens, bras, wool base layers such as tops, under shirts, leggings, bras, underwear & more.

WOOL HALF ZIP FOR MEN: This half zip long sleeve top for men fits effortlessly under mid & outer layer pieces for the ultimate cool weather adventure. The odor resistant and comfortably worn top helps regulate your temperature.

WOOL LIGHTWEIGHT SHIRT: This wool top for men has rib fabric & forward set side seams that provides stretch & comfort. This wool base layer is crafted of 100% merino wool.

MERINO WOOL LAYERS: Stay warm from head to toe in Icebreaker outdoor clothing gear. Keep covered in wool gloves, glove liners, mittens, bras, wool base layers such as tops, under shirts, leggings, bras, underwear & more.

WOOL HALF ZIP FOR MEN: This half zip long sleeve top for men fits effortlessly under mid & outer layer pieces for the ultimate cool weather adventure. The odor resistant and comfortably worn top helps regulate your temperature.

WOOL LIGHTWEIGHT SHIRT: This wool top for men has flatlock seams to prevent chafing & underarm gusset for comfort & mobility. This wool base layer is crafted of 100% merino wool.

MERINO WOOL LAYERS: Stay warm from head to toe in Icebreaker outdoor clothing gear. Keep covered in wool gloves, glove liners, mittens, bras, wool base layers such as tops, under shirts, leggings, bras, underwear & more.

【Functional Fabric】SPVISE athletic compression shirt for men are made of Moisture wicking & Breathable & Lightweight fabric. Cool Dry long sleeve sports shirts are enough comfortable feel as you running, workout and athletic, tets you active freely.

【Designed for All-Season】Great Performance in warm or cool weather. Sweat and Moisture can be pulled away from skin very quickly; Enable sweat easy for air-dry to prevent clothes sticking to the body. You can use these compression tops for athletic baselayer, undershirt, workout t-shirts or daily wears.

【Performance Design】Ergonomic design keeps seams off high abrasion areas & increases durability. 4-way stretch construction moves better in every direction, tight fitting but not too tight, like a second skin. Comfortable turtle-neck and crew-neck running gym shirts.

Comfortable Base Layer: Our men's long underwear features dual-layer engineering with Merino Wool fabric that traps body heat between the layers to provide a chill-blocking natural barrier of warmth

Efficient Design: Our men's thermal underwear features convenient gussets and a comfortable non-itch waistband with a functioning front fly that maintains coverage and allows for freedom of motion during various activities

Regular Fit: Our men’s long underwear boasts a tagless design and flat seams for a smooth, ultra-comfortable fit; Front and back rise feature true sizing for accurate fit

Thermal Underwear for Men: Our crew neck thermal tops for men are made of a 100% Polyester blend to keep you warm; rib cuffs provide added protection from cold

Comfortable Thermal Underwear: Heaviest weight polyester garment traps and retains body heat; comfy and soft thermal undershirt does not shrink excessively after washing

Versatile Thermal Underwear Tops for Men: These thermal tops have a tagless label and are machine washable; rated for extremely cold weather and activity range of medium to high

Thermal Underwear for Men: Our thermal tops for men are made of 100% Polyester rib knit that keeps you warm; rib cuffs provide added protection from cold

Comfortable Thermal Underwear: Silvadur technology inhibits odor; comfy and soft thermal undershirt with moisture-wicking inner layer and fast-drying performance

Versatile Thermal Underwear Tops for Men: These thermal tops have a tagless label and are machine washable; rated for cold weather and activity range of medium to high

WOOL UNDER SHIRT: An ultralight T-shirt with super soft & durable merino wool blend. This crewe tee provides the versatile, breathable comfort you need for both active pursuits & daily life

WOOL HIKING TEE: Breathable, odor-resistant tee with corespun fabric & next to skin softness. Flatlock seams prevent chafing. Crafted of 83% merino wool, 12% nylon, 5% LYCRA

MERINO WOOL LAYERS: Stay warm from head to toe in Icebreaker outdoor clothing gear. Keep covered in wool gloves, glove liners, mittens, bras, wool base layers such as tops, under shirts, leggings, bras, underwear & more

High-IQ Advanced Evaporation Technology – fast wicking hollow-core fibers transport moisture to the outer surface to dry quickly Flat-lock stitch seam construction

Multi-direction stretch fabric allows for un-restricted range of motion Open fabric structure offers lightweight warmth and all day comfort

UPF 40+ sun protection Polygiene odor Control Technology Ergonomic panels are form fitting (non-compression)

WOOL UNDER SHIRT: An ultralight T-shirt with super soft & durable merino wool blend. This crewe tee provides the versatile, breathable comfort you need for both active pursuits & daily life.

WOOL HIKING TEE: Breathable, odor-resistant tee with corespun fabric & next to skin softness. Flatlock seams prevent chafing. Crafted of 83% merino wool, 12% nylon, 5% LYCRA

MERINO WOOL LAYERS: Stay warm from head to toe in Icebreaker outdoor clothing gear. Keep covered in wool gloves, glove liners, mittens, bras, wool base layers such as tops, under shirts, leggings, bras, underwear & more.