Best Solid Mens Thermal Underwear Bottoms in 2026

【Ultra Soft & Warm】LAPASA thermal underwear set are made with a polyester spandex micro-fleece fabric to provide the ultimate warmth, to weight ratio when the temperature begins to drop and minimizing heat loss. Super soft and comfortable men's base layers like a second skin for you.

【FLEX FIT】The elastic polyester spandex used has 4-way stretch to give you flexibility to move with you and keep you warm without sacrificing your range of motion or comfort. When you're going out, you can wear this thermal underwear top and bottom under your clothes to keep you warm and comfortable in cold climates or inclement weather while maintaining flexibility in activities.

【LAYER OF COMFORT】These thermal underwear set are designed to be thin but effective at insulating body heat. The light material is not just able to retain body heat but simultaneously wick away moisture to maintain a comfortable temperature.

Traditional full length thermal pant made from U.S. sourced cotton and recycled polyester

Soft mini waffle fabric long johns underwear bottoms

Provides insulation and warmth in cold to moderately cold conditions

【Ultra Soft and Comfortable】Long johns for men is made of 92% Polyester and 8% Spandex, luxurious and snug, but it doesn't restrict movement at all. The men thermals top and bottom set matches neatly and when temperatures are close to or are freezing cold, they keep you quite warm.

【Highly Stretchable】Wear-resistant and shrink resistant material. Offers full mobility and freedom of movement, gives you flexibility to move and keep you warm without sacrificing your range of motion or comfort. The long underwear mens can be worn as comfy pajamas on chilly nights.

【Good Moisture Wicking】Men's base layers are designed to be thin but effective at insulating body heat. The lightweight material is not just able to retain body heat but simultaneously wick away moisture to maintain a comfortable temperature.

Heat Retention: When it comes to warmth and everyday wear, these long johns for men 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 underwear set will keep you feeling comfortable throughout the day.

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

🍀ULTRA SOFT & WARM FABRIC🍀 Thermal Underwear is Made of Premium Silky Soft Lining for Excellent Comfort and Warmth in Cold Weather

🍀KEEP WARM & BREATHABILITY🍀 Perfect for cold weather, comfy stretch software in normal thickness, breathable, lightweight but warm, works excellently during your winter activities like snowboarding for added warmth

🍀EXCELLENT FLEXIBILITY FOR ANY MOVEMENT🍀 Four-way stretch compression is designed for Freedom of Movement and to keep your Body Looking Slimmer. Flatlock stitching creates a flat seam to the garment to ensure maximum comfort

Classic 2-ply cotton-rich thermal underwear

Choose these base-layer bottoms for everyday warmth during low activity levels

*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.)

TSLA Thermal Underwear Series for warmth and soft touch.

[Materials] Mix of Polyester & Elastine fabric is excellent mobility and moisture-wicking.

LIGHTWEIGHT – Mens Merino Base Layer Available in: Lightweight = 165 g/m², Midweight = 250 g/m², Heavyweight = 320 g/m². FREE MERINO WOOL HIKING SOCKS ($21 VALUE!) –  Lightweight Merino Wool Pants for Men 165 g/m² + Wool Socks. Cool Packaging! MAKES A GREAT GIFT!

SUPER SOFT & COMFORTABLE – 100% Superfine 18.5 Micron Merino Wool Underwear Mens provide all day comfort and no itch! Designed for daily wear without rubbing and overheating of regular cotton.

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

PACKAGE INCLUDES: 1 – Men’s Merino Wool Thermal Leggings in Denim Blue / Medium | MATERIAL: 18.5 Micron, 100% Merino wool, 250g/m2 | FIT: Next-to-Skin

SUPER SOFT: 100% all natural superfine 18.5-micron Merino wool ensures comfort all day long – no itch! EASY CARE: Your thermal pants are machine-washable on cold setting and safe to tumble dry on low heat with like colors, so it’s ready when you are for your next adventure.

BREATHABLE: Keeping you cool in summer and warm in winter, MERIWOOL’s 250g/m2 weight interlock-knit Merino wool can be used as a base layer or mid-layer, but won’t weigh you down. COMFORTABLE & CONVENIENT: Quick-drying pants feature a loop for hang drying while camping, hiking, hunting, working, playing sports, skiing, or partaking in any outdoors activity.

ULTIMATE THERMAL RETENTION: Designed with high quality fleece lining, the thermal underwear mens is windproof, Set of long sleeve thermal shirt and bottoms can keep you warm while running, cycling, hiking, hunting, jogging or walk the dog for extreme cold weather.

WICKING BREATHABILITY & QUICK DRY: Breathable and moisture wicking fabric is perfect to keep sweat away and dry fast, it perfectly repels odors and unpleasant smells left behind from sweat and dirt, enjoy your outdoor tactical training or sports freely.

STRETCHABLE & ABRASION RESISTANT: Made of 91% polyester+ 9% spandex, this thermal underwear offers maximum freedom and support of your body, protecting your muscle trauma during training and keeping you stay comfortable. Flatlock stitching creates a flat seam to the garment to ensure maximum comfort and prevents chafing.

[ALL-DAY COMFORTABLE WEARING EXPERIENCE]: ★★★Size guide: Please order 1 size larger than you normally wear.★★★ Mens long johns thermal set made of 92% Soft Polyester / 8% Spandex blend super skin-touch fabric with fleece lined. Long johns for men fit snug like a second skin for minimizing heat loss, lightweight but warm, thermal underwear set gives you a sense of security throughout the winter.

[STRONG MOISTURE WICKING]: Mens thermals top and bottom set is made of moisture wicking and breathable fabric, with wool thermal underwear men moisture transport system, wick away sweat fast to keep you dry and light, easily keep away from the clammy feeling. You can relax or brave the outdoors pursuing your active lifestyle at any time.

[PERFECT DESIGN FOR MAN]：Mens long johns winter base layer perfect for use underneath formal or casual attire, or they can be worn as comfy pajamas on chilly nights. When going out to jogger, run, bike, dress up this set under your clothing to keep warm and cozy in cold climates or bad weather.

HEAT PRESERVATION & SUPER WARM - Designed with high quality fleece lining, the thermal underwear mens is windproof, it can keep you warm while running, cycling, hiking, jogging or walk the dog in the winter morning

BREATHABILITY & QUICK DRY - Breathable and moisture wicking fabric is perfect to keep sweat away and dry fast, the mens thermal underwear perfectly repels odors and unpleasant smells left behind from sweat and dirt; With this thermal underwear men, you can happily enjoy outdoor tactical training or sports

STRETCHABLE & ABRASION RESISTANT - Made of 92% polyester and 8% spandex, this army thermal underwear offers maximum freedom and support of your body, protecting your muscle trauma during training and keeping you stay comfortable. Flatlock stitching creates a flat seam to the garment to ensure maximum comfort and prevents chafing

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.

Flexible and comfortable fabric: Soft and elastic fabric fits close to the second layer of skin. 2 side pockets provide the convenience of carrying essentials for outdoor sports

SILKWORLD Thermal Leggings Series designed for warmth, soft fleece interior base layer retains heat and keeps you warm while running in the cold while feeling lightweight

Aesthetic part of your workout and optimize your performance, no sense of restraint during exercise for more flexible and breathable training; ergonomic seam design follows the natural lines of the body for incredible comfort

【Ultra Soft and Ultimate Thermal】(Note:this thermal clothes no open fly) - Mens thermal underwear made of 92% polyester, 8% spandex, crew-neck , Skin-friendly, light, slim fit that ensures no bunching around your waistline or sleeves and reduces heat loss.The thermal set is lined with downy and windproof, keeps you warm on cold autumn winter days.

【Moisture Wicking and Breathability】Mens thermal base layer is made of breathable and moisture wicking fabric, it's Instantly absorbing sweat and keeps you away from unpleasant feelings. It's perfect to exercise with the winter thermal long johns, against unpleasant smell caused by sweat.

【Great Flexibility For Activities】The thermal clothing for men is made of 4-way stretch to enhance freedom of movement. The compression shirts and sports leggings offers powerful support for your muscles and joints. Flat lock will prevent grinding your skin and keep the comfortable feeling in activities.

【ULTRA SOFT & WARM FABRIC】Men's thermal underwear set is made of polyester, micro-fleece fabric and four-way stretch fabric to give the ultimate warmth during the cold weather, which keeps you away from chilled wet and clammy. The ultra-soft microfibers make this thermal base layer one of the most comfortable thermals available. At the pants, use lightweight and durable tagless free elastic band, which is suitable for most people to wear comfortably all day.

【Free Stretch】There is not provide the fly hole opening in the pants. The latest Four-way stretch material provides a breathable and comfortable fit. The 4-way stretch delivers full mobility and a squat proof design, its strong seams won’t tear prematurely. Mens winter thermal underwear is super highly stretchable and softable .Thermal underwear set fit snug like a second skin for perfect heat retention minimizing heat loss for an ideal base layer or worn on their own.

【MOISTURE WICKING】: Mens thermals underwear top and bottom set is made of moisture wicking and breathable fabric, with the lightweight thermal underwear men moisture transport system, wick away sweat fast to keep you dry and light, easily keep away from the clammy feeling, all the while, insulating from the cold. so you can wear them to relax outdoors or exercise at any time.

Waffle knit traps heat, fast dry wicks away sweat and fights odor

Rugged flex technology for ease of movement

Smooth flatlock seams and tagless label enhance comfort

2 pieces: 1 men's thermal shirt, 1 men's thermal pant

60% Cotton, 40% Ultra-Soft Polyester

These heavyweight cotton men's thermal sets are engineered with advanced performance and endurance in mind. The cotton-blend fabrics help you endure the harshest environments. Advanced thermoregulation technology works to keep you comfortable in a variety of environments.

🔥Must-have Winter Thermals: Our men's warm and comfortable base layer is the best all-around thermal underwear for men. Made of 92% polyester and 8% spandex, the spandex makes them extra flexible so the baselayer feels snug and cushy, and the polyester provides a strong kick of insulation to keep you toasty. This long underwear mens is also soft—a Fleece Lined gives a velvety feel against your skin, provides definitive comfort while keeping your whole body warm.

🎁Fits like a Glove: Fit is the key to warmth, our long johns for men are designed to fit skin tigh to keep you warm yet dry and cozy and do a great job blocking wind. The Top & Bottom Set are reinforced with design details on the elastic collar at the neckline, cuffs and other joints to help you withstand the cold. The pants will not only help keep warm, they will also reduce soreness in your legs after an intense day in the backcountry. Nice gift for your husband, father, boyfriend, son!

🔥Lightweight & Durability: These thermals for men are tailored specifically to a man’s body and provide a form-fitting but unconstricting fit. The 4-way stretch delivers full mobility and a squat proof design, its strong seams won’t tear prematurely. For even more added comfort, mens thermal underwear set have no tags, which reduces any skin irritation. And the thermal pant has a stretchy elastic waistband that helps to fit most body types. You can slip them on and off easily.

🔥[All-Day Warm and Comfortable]: Our 2022 brand new upgraded Mens base layer set made of 90% Soft Polyester/ 10% Spandex blend super skin-touch fabric with high-end fleece lined, which gives a velvety feel against your skin, provides definitive comfort while keeping your whole body warm. It's close-fitting like a second skin, so that you don’t have to deal with excess fabric bunching and gives you a lot more freedom to enjoy the outdoors. It's the Best Thermal Clothing for Winter.

🔥[Moisture-wicking & Odor-resistant]: Moisture wicking is important when selecting thermal underwear for men because the worst feeling in the cold winter weather is the clammy, cold sweat that happens, which leads to areas of your body feeling the cold more acutely. While our fleece thermal top and bottom set will wick away moisture fast and absorbing odor, keep you dry and warm and smart odor control. You will enjoy all-day comfortable and confident!

🔥[Tagless & Pee Hole Design]: For even more added comfort, long johns for men thermal have no tags, which reduces any skin irritation; The thermal pants has a elastic waistband that helps to fit most men's figures and are easily put on and taken off. And the humanized Fly Hole design is perfect for daily life. What's more, the long underwear are reinforced with design details on the elastic collar at the neckline, cuffs and other joints to help you withstand the cold.

MENS THERMAL UNDERWEAR SET - Thermal underwear for men contains thermals tops and pants. It is made of 92% high-weight polyester and 8% recoverable stretch spandex with fleece lined, using a blending process that provides skin-friendly warmth and allows you to stretch your body during exercise and wear it all day long without being constricted.

POWERFUL INSULATION AND COMFORT - Mens thermals top and bottom set is made of high grammage polyester with brushed interior, specially designed to withstand the cold, you can feel the fleece lined underwear wrapping around you when you wear it, no matter how cold indoors or outdoors in winter, men's base layers like a second skin for you. Comfortable mens long johns are designed with reinforced elastic collar at the neckline, cuffs and other joints to help you withstand the cold in the details.

MOISTURE WICKING - Long underwear mens is made of lightweight and breathable base layer fabric, which can absorb sweat and moisture from the body. The knitting process makes the fabric extremely stretchable and allows moisture and sweat to be fully discharged, keeping your whole body dry and comfortable, away from the sense of humidity, making you feel comfortable and happy in the gym, outdoor hunting and other situations.

【Ultra Soft & Lightweight】Mens thermal underwear is a ultra soft lightweight thermal set of both a thermal shirts top made of a polyester and spandex material that will moisture wicking breathable to keep you warm and dry so you can wear them all day and don't worry sticky or clammy your skin.

【Warm & Comfortable】Thermal underwear men are made of premium fabric that have mirco fleece lined can retaining body heat to keep your body warmth in the winter.Perfect for baselayer under your clothes thermal underwear men.Close-fitting thermal underwear style naturally providing maximum comfort and softness to care your skin.

【Stretchy & Durable】The thermal underwear shirts can provide extra 13-way stretch and compression to offer full mobility. Thermal shirts use its strong seams won’t tear prematurely so you can move freely while at home,outdoor and indoor gym activities,office work, or another performance.

Flatlock seams to avoid irritation

Tagless labels for more comfort

Two-layer thermal for warmth in cold weather

【Must-have Winter Thermals】: Stay warm and cozy this winter with our men's thermal underwear. Made with 92% polyester and 8% spandex, our base layer provides optimal insulation while remaining flexible for a wide range of motion. Plus, the velvety fleece lining ensures unbeatable comfort and warmth all day long. Don't let the cold weather slow you down - stay cozy with our top-quality men's thermal underwear.

【Fits like a Glove】: Designed to fit snugly and block wind, our men's thermal long johns will keep you dry and comfortable. The top and bottom set features reinforced elastic collar, cuffs, and other joints to help you withstand the cold. Perfect for an intense day in the backcountry or a chilly day in the city, our long johns will keep you warm and reduce soreness in your legs. A great gift for any man in your life - husband, father, boyfriend, or son!

【Get the perfect fit and durability with our lightweight men's thermal underwear. With 4-way stretch, our thermals provide full mobility without tearing prematurely. Our tagless design minimizes skin irritation, and the elastic waistband ensures a comfortable fit for most body types. Enjoy complete comfort and freedom of movement with our men's thermal underwear.

🔥【All Day Warm & Comfortable】 Our winter thermals for men is made of 92% Polyester and 8% Spandex fabric with Microfiber fleece lined, providing enhanced warmth and insulation. Thus it minimizes heat loss and regulate your body temperature in the cold winter. The tightly closed knitted seams, super Skin-touch and Ultra Soft men thermal set fit snug like a second skin for keeping the cold air out and preserving heat effectively. Keep you Warm and Comfy All Day!

💦【Superior Moisture Wicking】 Made of Breathable and Quick-drying fiber perfect to absorb sweat and dry fast in exercise. romision men's long underwear is 60% Higher absorbent than other men's thermals. With moisture transport system and odor control function thermal set for men, keep you dry and light, easily absorb the unpleasant smell during workout and keep away from the clammy feeling. You can relax or brave the outdoors pursuing your active lifestyle at any time.

💪【Excellent Flexibility for Any Movement】 The mens long underwear set is designed with 4-way stretch compression, its strong seams won’t tearing while keeping elasticity. Men's long johns add range of motion and offer maximum support for body, you’ll feel a sense of freedom in all activities. Besides, designed to increase the amount of oxygen in the blood, our thermal wear for men can improve blood circulation, protect you from muscle injury and great for outdoor activities.

Poly-wool blend regulates temperature, fast dry wicks away sweat and fights odor

Rugged flex technology for ease of movement

Smooth flat lock seams and tagless label enhance comfort

FLEECELINING & ACTIVE PERFORMANCE - Made of Premium Silky Soft Fleece Lining, Fleece material provides Ideal warmth Performance for Indoor & Outdoor Activities, Running and Hiking, Excellent Active Wear for Sports and Movement, Light weight and Enhanced Durability, Individually Packed Well for Protection

DRY & WICKING PERFORMANCE - Made of Fine fabric for Optimized Quick Dry & Moisture Wicking Performance, Can be worn all day long in Fresh Condition, Excellent Breathability to provide Optimized Ventilation and Air Circulation

4 WAY STRETCH SPAN & FLATLOCK STITCHING - 4 Way Stretch Span allow you Great freedom of movement, Compression Fit to keep your Body Looking Slimmer, Suitable for Sports and Outdoor Activities, Flatlock stitching for Friction Free to eliminate Annoying itching

Beat the Cold - Made with advanced bamboo charcoal fiber, the thermal underwear for men has excellent thermal insulation and heat retention without being bulky. Moreover, the wrist and ankle closure designs store heating and isolate the cold air, keeping you warm on chilly days. Apart from that we use professional 4-needles and 6-threads seaming which dramatically reduces heat leaving your body.

Excellent Wick Capability - Equipped with bamboo charcoal fiber, the long johns for men is exceedingly absorbent, more than 40% absorbent as compared to other fabrics. Furthermore, the bamboo charcoal fiber is filled with micro gaps and holes, thus allowing for better moisture absorption and breathability than others. long underwear mens absorb excessive moisture much faster and keeps your core body temperature stable.

4-Way Stretch Fitted Suits - Base layer men adopts the latest 4-Way Stretch technology that allows you to exercise freely and assist your body in cold weather. Flexibility and full mobility are upgraded with thermal underwear for men. Besides, the base layer men is designed to increase blood flow and protect muscle. Thermal underwear for men not only improves blood circulation but also protects you from muscle injury. It is an ideal fit for sport activities and workouts.

【Micro Fleece Lined】 90% Polyester, 10% Spandex.

【Ultra Soft & Warm】 Thermal tech fleece fabric of the baselayer caresses the skin so naturally providing maximum comfort and softness.

【Stretchy & Durable】 Spandex added for extra stretch and shape retention; close-fitting style does better in retaining body heat to keep you warm.

[Premium Comfort] The thermal underwear is made up of 92% polyester, 8% spandex, which is soft for thecozy, comfortable and non-irritating experience, to beat the cold weather.

[Highly Flexible] The underwear features 4 way stretchy and compression fabric for a more flexible fit to your body without bound feeling, allowing you to move freely. Meanwhile better keep warm without losing body heat.

[Ultra-Quick Dry] The moisture wicking micro fibers are designed to be breathable to keep you dry from moisture, sweat, repel odor, unpleasant smells.