Best Lightweight Mens Base Layers in 2026

Stay comfortable all day long with our lightweight and quick-dry fabric that wicks moisture away from your skin.

Protect your skin from the sun's harmful UVA/UVB rays with our UPF 50+ fabric.

Say goodbye to chafing with our flatlock seamlines and tagless collar that increase comfort.

The Heavyweight Bottom is a foundational next-to-skin baselayer that keeps the lower limbs warm during long periods of frigid inactivity while wicking moisture when on the move. With a comfort stretch fleece for warmth and channeled construction for added breathability and moisture management, the Heavyweight Bottom is perfect for cold weather days spent in a layout blind, stand or glassing in the backcountry.

GORE OPTIFADE Concealment Open Country is scientifically optimized for engagement ranges of 50 yards and beyond at ground level in rocky terrain above the timber line.

Fabric: Heavyweight Comfort Stretch Fleece (93% Polyester/7% Elastane).

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

UA Base 3.0 All Season Baselayer is extremely versatile, providing midweight warmth & mobility to a variety of activity levels & cold temperatures

UA Scent Control Technology to keep you undetected in all pursuits

Soft, brushed grid interior traps air against your skin, closely managing your body's microclimate to keep you warm & comfortable

Odor-resistant

Temperature regulating

Will help keep you cool when your intensity amps up, and its design helps minimize chafing

LIGHTWEIGHT – Mens Merino Base Layer Available in: Lightweight = 165 g/m², Midweight = 230-250 g/m², Heavyweight = 320+ g/m².

SUPER SOFT & COMFORTABLE – 100% Superfine 17.5 Micron Merino Wool Mens Base Layer provides all day comfort and no itch! Designed for daily wear without rubbing, overheating, or bunching of regular cotton.

MOISTURE WICKING & ODOR RESISTANT – Merino base layer mens natural wicking and odor-resistant properties allow it to absorb moisture better than any other fabric, keeping you dry and fresh.

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.

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.

Lightweight & Breathability: Men's athletic hiking Shorts are made quality 4-Way Stretch/breathable and quick-drying fabric helps to wick away moisture and dry quickly keep you cool. A synthetic of polyester and spandex can be very durable, abrasion-resistant, and stretchy enough to allow for better mobility.

UNIQUE: Exercise cool Shorts have stylish casual breathable holes on both sides, designed exclusively by NORTHYARD. Soft Elastic waistband/ built-in adjustable drawstring for custom fit, flatlock seams reduce chafe for additional comfort and ease of movement.Two stylish reflective strips at the front and back allow you to improve safety in low-light situations.

3 Zipper Pockets: Men's athleisure unlined Shorts feature conveniently placed and easily accessible pockets so that you can quickly store and retrieve your items. The 2 side and 1 back pockets with zipper offer easy storage for your essentials and are also deep enough to prevent the items from falling out during activities.

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.

Cool Moisture Transport System for wicking away moisture and fast drying. Available in all Sizes Regular & Tall

Exceptional for Running Jogging Soccer Working Out, Gym Time, Swimming & all other active sports

Lightweight 3.8 ounce 100% Polyester for a super ultra soft feel

A 2-layer construction with flatlock seams, 100% wool exterior and the unique properties of technical lifa technology

PACKAGE INCLUDES: 1 – Men’s Merino Wool Thermal Crewneck Top in Charcoal Gray / Medium | 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.

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.

Champion Shirt Quality Fabric: Soft, lightweight, cotton blend fabric; keep you cool, dry and moving comfortably during your workout. The Champion shirts for men are machine washable.

Champion Crewneck Features: The casual wardrobe-essential men shirts feature crew neck, short sleeves. There are 2 pack workout shirts for you; you can choose to wear different color and style.

Muscle Shirts For Men Occasions: The mens workout shirt is perfect for sports and training activities, such as yoga, bicycling, running, playing basketball, football, weight lifting, etc.

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.

*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.

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

Strategically placed flatlock seams reduce chafing

Concealed thumb loop

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.

Quick dry technology

Lightweight flexible and durable

Crew neck construction

【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.

[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.

Men's long-sleeve waffle knit pullover undershirt and bottoms. Dickies thermal winter gear add an extra layer of warmth to your cold-weather looks with these long-sleeve thermal long johns for men from Dickies.

The cotton/spandex-blend fabric of this mens base layer set keeps you comfortable and warm. This men's long-sleeve thermal wear undershirt is made from a soft, moisture-wicking fabric blend.

Dickies mens long johns poly-spandex construction grants enhanced insulation, and the cozy flat lock pattern helps trap warmth and keep you comfortable all through the winter days without any extra bulk.

Cooling: Made from 6-channel Coolmax polyester and elastane, this sleeveless tee is designed to cool your body 6 degrees

Breathable: Large-hole mesh construction makes this sleeveless base layer light, airy and cooling

Moisture-Wicking: Quick-drying, moisture-wicking polyester performance fabric keeps you cool and dry during intense workouts in the summer heat

PERFORMANCE. The T-Shirt is made of an innovative Polartec Delta cooling fabric system. Due to the special fiber structure and design, it helps the body to remain cool even in the hottest conditions. It has high breathability, great moisture-wicking properties and helps to prevent unpleasant odor. No matter how high the air temperature is - you will remain cool, dry, and fresh.

COMFORTABLE FIT. Thought-out cut of the Punisher Delta T-Shirt is designed to flex and move with your body. Lightweight 4-way stretchable fabric supports your every move and prevents any chafing. Flat seams do not cause rubbing or irritation and do not create additional pressure when you are using backpack, sports bag, climbing gear or any other type of equipment.

GENUINE POLARTEC. At 281Z we use only genuine Polartec fabrics for our performance products. Polartec's expertise in performance fabrics is unprecedented and we are eager to implement it into our products. Polartec fabrics bring us the confidence that the design of every 281Z garment will work as intended.

Lightweight single layer engineering with an exceptionally soft feel

Best used as a base layer for low bulk layering in cold to very cold weather and medium to high activity levels

Flat Seams and Tagless with Front and Back Rise

QUALITY LIGHTWEIGHT BASELAYER: 100% Merino Wool designed to be "First-On-Last-Off" extreme comfort quality active wear. The best in easy care technology means your merino wool is machine washable and dryable. Your Minus33 t-shirt naturally wicks moisture

CRAFTED TO FIT: Sizes XS to 3XL in a regular fit. Minus33 offers an awesome size and color selection. Outfitting anyone with everyday wear from the active athlete to the comfortable couch-potato.

EXPERIENCED BRAND: Although there are many copy-cats on the market today, Minus33 has been a trusted brand since 2004.

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.

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.

LIGHTWEIGHT Polo – Package includes Merino.tech Merino Wool Polo Shirts For Men Lightweight 165 g/m². Our merino wool shirt fulfills a gap between everyday technical apparel & luxurious leisurewear.

SUPER SOFT & COMFORTABLE – 100% Superfine 17.5 Micron Merino mens wool polo provide all day comfort and no itch! Designed for daily wear without rubbing and overheating of regular cotton.

MOISTURE WICKING & ODOR RESISTANT – merino wool shirt men natural wicking and odor-resistant properties allow it to absorb moisture better than any other fabric, keeping you dry and fresh.