Best Outdoor Mens Base Layers in 2025

Moisture wicking fabric is quick-drying, ultra-soft & has a soft feel, keeping you comfortable through any athletic activity.

Designed for a comfortable experience. Crew-neck provides a nonrestrictive fit; Long-sleeve allows for a wider range of motion

UPF 50+ provides protection from harmful UV rays

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.

Quick dry and breathable fabric. Won't deform and fade, as mild as the second skin. Keep cool in summer, stay dry and warm in winter, excellent for outdoor sports

2 side pockets provide the convenience of carrying essentials for outdoor sports; wide waistband for optimal coverage and the 4 way stretch fabric for mobility in any direction, more flexible and cool dry in training

Aesthetic part of your workout and optimize your performance. Leggings provided excellent protection from the sun, the flatlock seams against abrasions and make it more durable

Heat Retention: When it comes to warmth and everyday wear, these mens thermal long sleeve shirt is designed specifically for you to stay protected from the cold.

Ultra Soft Fleece: Designed with a fleece lining & quality material, these ultra soft mens thermal shirt will keep you feeling comfortable throughout the day.

Moisture Wicking: Stay dry with these mens long underwear as they're made from breathable fabric that effectively wicks away moisture and perspiration.

Men's thermal underwear is made of polyester and micro-fleece fabric to give the ultimate warmth during the cold weather. Mens base layer will keep you slim and warm in winter or spring.(Note:this thermal set no open fly)

Breathable and moisture wicking fabric is perfect to keep sweat away and dry fast, mens thermal clothes can removes sweat and stickiness while preventing colds.The mens compresssion set will make you feel relax after you sports.

Ultra soft brushed back fabrication provides ultra-comfortable wear Long johns for men is extremely soft and smooth, lightweight, and non-bulky, anti-static four-way stretch fabric for a snug-fit, shrinkage controlled for lasting size and shape retention.

[Excellent Flexibility For Any Movement] The men’s thermal clothing is designed with four way stretch compression for your freedom of outdoor activities, never have bound feeling. Flat lock will prevent chafing and irritation of skin. Ignore the size chart provided by amazon, check the size chart of the last picture to select the appropriate size *The set is designed for outdoor sports, there is NO OPEN FLYING on the pants*

[Slim&Light But Keep Warm In Winter] There are a long sleeves shirt and pants in package. They’re really light, soft and comfortable, especially for keeping warm in cold conditions. Ensure that the thermal long johns for men will bunch around your waistline or sleeves and reduce heat loss.

[Instantly Absorbing Sweat In Exercise] The thermal fitness shirt for men is made of moisture wicking and breathable fabric, which will absorb sweat and dry quickly in exercise and keep away from clammy feeling, provide a enough comfort and warmth when you play sports in cold weathers.

[High-performance Baselayer for Body shaping] The fitness baselayer for men is designed with 92% Polyester and 8% spandex, which maintains its shape even after repeat washing. The athletic men’s compression set will give the protection for your skin, and joints , support your muscles well with less risk of rash, overheating or muscle fatigue in athletic activities

[Instantly Absorbing Sweat In Exercise] The sport long johns for men is made of moisture wicking and breathable fabric, which will absorb sweat and dry quickly, keep away from clammy feeling and help regulate body temperature in exercise. The gym underwear set will provide a enough comfort when you play outdoor sports and gym exercise

[Excellent Flexibility For Any Movement] The compression shirt for men is designed with four way stretch fabric for your freedom of activities, really slim and light without bound feeling, allowing you to bend, stretch, jump and run freely. It's great for running, hiking, cycling, marathon, training, playing basketball, football , baseball, volleyball.

PACKAGE INCLUDES: 1 – Men’s Merino Wool Thermal Crewneck Top in Black / X-Large | MATERIAL: 18.5 Micron, 100% Merino wool, 400g/m2 | FIT: Fitted

SUPER SOFT: 100% all natural superfine 18.5-micron Merino wool ensures comfort all day – no itch! EASY CARE: Heavyweight long sleeve crew top shirt is machine-washable and dryer-safe, so it’s ready when you are for your next adventure.

400g OF WARMTH: Our most popular 250g midweight crewnecks just got an upgrade! Take your warmth to the next level with our new 400g heavyweight crewneck tops. The perfect base or mid layer for cold to freezing conditions make these thermal tops our warmest and thickest base layers yet! COMFORTABLE & CONVENIENT: These quick-drying shirts with a UPF Rating 50+ are perfect for your next trip, whether your camping, hiking, hunting, playing sports, skiing, or partaking in any outdoors activity.

Materials: Polyester; Wrinkle-free, Quick Dry and Soft

UPF 50+: Excellent protection from the harmful effects of the Sun's UV Radiation

Quick Dry: This men's long sleeve shirt features high performance wicking fabric that pulls moisture away from skin, breathes freely and dries quickly for active

Sun Protection: breathable face cover design for your outdoor activities which provides windproof and UPF50+ for your top,facial, neck, head for all-round protection from the sun's harmful UVA/UVB rays.

Quick Dry & Breathable: Actively wicks moisture away from the skin, keeping you dry and comfortable. Great when you're out and about, and after washing too.

The 4-Way Stretch: The 4-way stretch & non see through fabric wicks moisture away from your skin for unrestricted movement and whole day comfort.

What You Get: Terramar Sports Thermasilk Women's Scoop top comes in Black, Natural and Grey options and in the following sizes: Small, Medium, Large and X-Large. Made from 100% pure silk, they feel extremely smooth and keep you warm

These shirts are very light weight and do not have additional bulk and made with our ClimaSense treatment to neutralize s, regulate your body temperature and wick away any sweat

Features: Thermoregulation Comfort Technology to regulate your body's natural temperature and keep your hands warm. It is built to stretch so there is no irritation or bunching

MATERIAL: Polyester, Silky-soft, Lightweight, Breathable And Comfortable.

QUICK DRY : Breathable and lightweight moisture wicking fabric, which keeps you cool and dry.

SUN PROTECTION: Protect skin from the Harmful Effects of the Sun's UV Radiation.

Durable Moisture Wicking Fabric: Made of 100% CPT Performance Polyester on the inside and 70/30 Polyester/Merino Wool blend on the outside; Intellifresh freshness protection keeps unpleasant odors from forming on our thermal shirt

Regular Fit Thermals for Men: These thermal shirts for men feature a tagless design with flat seams and true sizing for accurate fit

Efficient Design: This men's long underwear top has convenient stay-put cuffs and a drop tail that maintains coverage and freedom of motion when worn during various activities

[Fabric] Polyester, moisture wicking, quick drying

[UV Protection] The sun protcetion shirts protect skin from sunburn in the sun.

[Design] This men's fishing shirts have round collar and flat-lock seams to reduce chafing and increase comfort.

*Alert: True to size : Please follow the size examples below*(EX: Size "Large recommended" - Size for 6" 215 lbs.) (EX: Size "Medium" 5'9"165 lbs.)

CQR FrostTech Series designed for active movement.

[Materials] 100% Polyester fabric is for moisture sensing, quick-dry, and 2-way air circulation.

Two layer construction: Soft inner layer of blended cotton and polyester next to your skin. Outer wool blend layer helps maintain warmth and durability

Pull on fly front long johns with ribbed ankle cuffs and plush-lined branded elasticized waistband

Strategic seam placement for maximum comfort and reduced chafing

Special one leg cutting design, dynamic and unique non-symmetrical design.

Made of polyester and spandex, ultra-soft ,comfort, keep good feeling in exercise.

Grip your muscle tightly, shape the body and protect the muscles well in active exercise.

Moisture-Wicking Fabric: Long johns for men feature a 100% CPT Performance polyester interior and 70/30 polyester/merino wool exterior with Silvadur Intelligent Freshness for odor control

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

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

NOTE: Pay attention to the SIZE chart of the third picture to select the appropriate size

Breathable soft fabric dries quickly, wicks sweat away and releases heat, helps keep you cool & dry; Perfect for running, workout, jogging, hiking, and even as a moisture wicking undershirt

The harmony of shirt and black long sleeve collision color design adds stylish. Crew neck reduces friction

Odor Resistant: Merino wool is extremely absorbent and has a breathable surface that quickly evaporates moisture without odors, keeping you dry. This is extremely important in cold winters to keep you from catching a cold. Great for outdoor activities, hiking/camping/hunting/skiing...

Temperature Regulation: One of Merino wool's most famous features is its natural ability to keep you warm when it's cold without feeling too hot, and cool when it's hot. There's no better way to wear a merino wool base layer mens in a changing climate.

Ultra Soft & Comfortable: 100% superfine 18.17 micron merino wool long sleeve shirt men is soft and comfortable, and fits gently against the skin without itching. Merino wool itself is extremely elastic, fits well and moves freely.

Rugged Flex moves with you; FastDry wicks away sweat; fights odor

Strategically placed flatlock seams reduce chafing

Concealed thumb loop

Stay warm and comfortable even in the coldest weather with our selection of outdoor wool products underwear.

Crafted with pure merino wool, this collection of base layer garments is designed to keep you warm and dry no matter what the weather throws your way.

The breathable and moisture-wicking fabric helps regulate your temperature so you stay comfortable all day, while the fit and smooth seams minimize chafing and irritation.

Durable, Moisture-Wicking Fabric: Constructed of 85% microfiber performance polyester and 15% spandex, these thermal shirts for men also feature Intellifresh(tm) odor-control on the fabric technology powered by Silvadur(tm)

Athletic Fit: The perfect long-sleeve workout shirts for men, our men’s thermals feature an extended body and sleeves, a tagless design, and flat seams for a smooth, ultra-comfortable fit

Efficient Design: Long-sleeve undershirt for men features a crew neckline and hemmed cuffs with thumbholes for easy layering; Drop tail maintains coverage without restricting freedom of motion

A comfortable crew for any activity this season.

FEATURES: Technical Polyester main fabric, 140gm/m² fabric, Quick dry and Wicking, Flatlock seams for great next to skin comfort

GOOD FOR: Camping & Hiking, Climbing & Mountaineering, Trekking, Urban & City Life, Sailing, Boating, Outdoor Recreation

TOP TO BOTTOM WARMTH: Guide Gear long johns for men provide head to toe warmth so each body part is pampered with cozy heat that makes it easy to withstand outdoor cold conditions

MOISTURE WICKING PIECE: This cold weather base layer is intended to collect all sweat and moisture so you stay presentable on the job. Feel dry relief while keeping odor and bacteria at bay

NO ITCH FEEL: Thermal base layer for men is crafted with a tagless neck for itch-free comfort and wear. You can wear it all day with no discomfort or irritation whatsoever

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

High quality muscle shirts are lightweight and stretchable with excellent elasticity and durability. The breathable fabric material that is soft and moisture wicking keeps you comfortable and dry.

Bodybuilding shirts is design in slim fit, feature with crew neck, raglan sleeves, short sleeves and 4-way stretch material makes you look more muscular and powerful while training.

Stylish athletic tee is great for all seasons. You can pair it with shorts, sweatpants for training activities; Or you can marry these fitness t shirts with chinos/jeans for a comfy-casual look.

What You Get: A Terramar Sports Military Fleece Base Layer pants that comes in all Black or Military Brown. Available in the sizes: Small, Medium, Large, X-Large, XX-Large, XXX-Large and Tall sizes. For a more relaxed fit, order a size up!

Made from a high quality blend to create an extremely comfortable and soft base layer pants meant for all day use! Ideal for outdoor riding, hunting ,hiking, skiing, snowboarding, Snowshoeing, cycling and other outdoor activities

Features: Thermoregulation Terramar Sports Technology that keeps you comfortable in all conditions and engineered to adjust to your body temperature due to our custom ClimaSense technology that helps control your body temperature!

【ULTRA SOFT & COMFORTABLE】The merino wool base layer set are designed in lightweight 165 g/m2 fabric, superfine 18.5 Micron Merino Wool next to skin provides all day comfort without itch.（A FREE NECK GAITER made in merino Wool $15 value as a gift, random color in the packages)

【TEMPERATURE REGULATOR】Merino wool Thermal sets for men are lightweight and breathable for outdoor activities. The merino wool helps regulating body temperature, providing ideal isolation from both heat and cold, keeping you comfortable whole day.

【MOISTURE WICKING & ANTI ODOR】Merino wool fiber is naturally moisture wicking and odor resistant,so that the athletic base layer for men is perfect for indoor or outdoor activities, without feeling clammy after sweating and it can last for days before you need to wash.

VERSATILE EVERYDAY WEAR. Perfect days need perfect tees, so slip into this Short Sleeve for moisture management and moisture-wicking, plus a custom mountainscape design. Paired with the "Go far. Feel good." mentality, and you're set for a perfect day.

REGULAR FIT. Designed to meet the demands of outdoor adventuring, this regular fit base layer offers room to move throughout the silhouette without any additional bulk.

WHY MERINO WOOL? Thinner and softer than regular wool, it's easy to wear next to skin. Each fiber transports sweat away as a vapor, wicks moisture (we tested it ourselves) and regulates body temperature to keep you cool in summer and warm in winter.