Best Long Johns Mens Base Layers in 2026

ULTRA SOFT AND SUPER WARM: CL Convallaria mens thermal underwear set is made of 90% Polyester / 10% Spandex blend fabric with high density fleece lined, the insulation material which can lock your body heat well. The super skin-touch and ultra soft long johns for men fit snug like a second skin for minimizing heat loss and keep you warm in the cold winter.

STRONG MOISTURE WICKING(WITHOUT THE SWEATY MESS): Our fans say the unique breathable, moisture-wicking fibers on CL thermal underwear will wick away moisture to keep you dry with no sticky or clammy feeling so you can wear them all day for your work or snow adventure. The smiles on men's faces will tell you how satisfied with this thermal underwear set.

4-WAY STRETCH INSULATED UNDERWEAR: While adopting the design of the Four-way stretch, we improved the crotch and armpit according to the feedback of market customers. make the reach and squat more comfortable while retaining excellent elasticity and durability for maximum mobility. CL uses high-quality stitching for thermal leggings and long sleeve shirts to beat super-active days and many muddy adventures.And insulated design let you get rid of static trouble in dry autumn and winter.

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.

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.

MIDWEIGHT — Mens Merino Wool Base Layer set Available in: Lightweight = 165 g/m², Midweight = 250 g/m², Heavyweight = 320 g/m². FREE MERINO WOOL HIKING SOCKS ($21 VALUE!) – Package includes Merino wool Midweight base layer mens top and wool men long johns 250 g/m² + Merino Wool Hiking Socks. MAKES A GREAT GIFT!

SUPER SOFT & COMFORTABLE – 100% Superfine 17.5 Micron merino wool base layer set mens provides all day comfort and no itch! Designed for daily wear without rubbing, overheating, or bunching of regular cotton.

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

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

[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.

MIDWEIGHT — Mens Merino Wool Base Layer set Available in: Lightweight = 165 g/m², Midweight = 250 g/m², Heavyweight = 320 g/m². FREE MERINO WOOL HIKING SOCKS ($21 VALUE!) – Package includes Merino wool Midweight base layer mens top and wool men long johns 250 g/m² + Merino Wool Hiking Socks. MAKES A GREAT GIFT!

SUPER SOFT & COMFORTABLE – 100% Superfine 17.5 Micron merino wool base layer set mens provides all day comfort and no itch! Designed for daily wear without rubbing, overheating, or bunching of regular cotton.

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

[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.

[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.

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

Cold-Weather Layering Foundation: Stay warm and comfy all year long with the Icebreaker Merino Standard 175 Warm Leggings for men! These insulated long johns for men are thermal to regulate body temperature, and match our Everyday Zip or LS crew top.

Reliable Materials: Made with 100% Merino wool, these warm men’s leggings are super-soft, and our winter pants for men naturally resist odor and manage moisture. This Merino wool base layer will keep you cool when it’s hot and warm when it’s cold.

Perfect Everyday Fit: Designed with a slim, contoured fit to help provide smooth cold weather layers, our men’s long underwear and men’s thermals are perfect whether you’re camping on a chilly summer night or enjoying a frigid winter adventure!

Cold-Weather Layering Foundation: Stay warm and comfy all year long with the Icebreaker Merino Standard 175 Warm Leggings for men! These insulated long johns for men are thermal to regulate body temperature, and match our Everyday Zip or LS crew top.

Reliable Materials: Made with 100% Merino wool, these warm men’s leggings are super-soft, and our winter pants for men naturally resist odor and manage moisture. This Merino wool base layer will keep you cool when it’s hot and warm when it’s cold.

Perfect Everyday Fit: Designed with a slim, contoured fit to help provide smooth cold weather layers, our men’s long underwear and men’s thermals are perfect whether you’re camping on a chilly summer night or enjoying a frigid winter adventure!

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

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.

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

Breathable, Durable Fabric: Our thermal shirts for men feature inner and outer layers constructed from a blend of 60% combed ring-spun cotton and 40% polyester

Relaxed Fit: Our men’s thermal long-sleeve shirt features a tagless design and flat seams for comfort; Fits loose on the body to allow for full range of motion

Efficient Design: Our tagless long-sleeve thermals for men are equipped with convenient rib cuffs and a drop tail that provides coverage without restricting freedom of movement

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

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

Reliable Heat Retention: Made of Raschel-knit fabric, our men’s long underwear not only traps and retains body heat, but also wicks away moisture and dries quickly

Soft and Cozy Construction: Our long johns for men feature a 100% brushed cotton interior and 100% performance polyester exterior equipped with Intellifresh(tm) technology powered by Silvadur(tm)

Comfort-Driven Design: Our ankle-length men's thermal underwear features ribbed cuffs that help keep the cold out; A center back gusset and front fly enhance functionality

Reliable Heat Retention: Made of Raschel-knit fabric, our insulated shirt for men not only traps and retains body heat, but also wicks away moisture and dries quickly

Soft and Cozy Construction: Our men's thermal long-sleeve shirt features a 100% performance polyester interior with Intellifresh(tm) powered by Silvadur(tm) odor-control technology and a 100% brushed cotton exterior

Efficient Design: Our tagless thermal shirt is equipped with convenient rib cuffs and a drop tail that provides coverage without restricting freedom of movement

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

Tall 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

MIDWEIGHT — Mens Merino Wool Base Layer set Available in: Lightweight = 165 g/m², Midweight = 250 g/m², Heavyweight = 320 g/m². FREE MERINO WOOL HIKING SOCKS ($21 VALUE!) – Package includes Merino wool Midweight base layer mens top and wool men long johns 250 g/m² + Merino Wool Hiking Socks. MAKES A GREAT GIFT!

SUPER SOFT & COMFORTABLE – 100% Superfine 17.5 Micron merino wool base layer set mens provides all day comfort and no itch! Designed for daily wear without rubbing, overheating, or bunching of regular cotton.

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

Base Layer: Offering thermal warmth, our heavyweight base layer 2-piece set will keep you cozy in the cold with a brushed fleece inside and matte soft outside. A close-to-the-body fit and tightly knit-fabric to wear under or on its own.

Moisture Wicking: Fabric helps to wick away moisture for stay dry comfort and warmth. The breathable densely knit fabric allows for maximized airflow and has a UV protection of 50+.

Stretch: Spandex stretches to move with you for flexible on-the-go comfort. Helps hug your body for a snug long underwear fit and comfy warmth retention. Delivers full mobility with no-bagging at the knees.