Best Outdoor Thermal Bottoms for Men of 2026

Name: HYCOPROT Men's Thermal Underwear Trouser Long Johns Bottom Winter Warm Base Layer Sports Pants Thermal Compression Leggings
Brand: HYCOPROT

John Zimmer

Last Updated: 4 Feb 2026

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Stay warm and comfortable during your outdoor adventures with these outdoor thermal bottoms. Designed for men, these bottoms are made from high-quality materials that provide excellent insulation and moisture-wicking properties. With their snug fit and soft fabric, they are perfect for layering under your trousers or as standalone bottoms. Whether you're hiking, camping, or simply braving the cold weather, these thermal bottoms will keep you cosy and protected. They are a must-have addition to any outdoor enthusiast's wardrobe.

At a Glance: Our Top Picks

#TOP 1

HYCOPROT Men's Thermal Underwear Trouser Long Johns Bottom Winter Warm Base Layer Sports Pants Thermal Compression Leggings

9.8

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HYCOPROT Men's Thermal Underwear Trouser Long Johns Bottom Winter Warm Base Layer Sports Pants Thermal Compression Leggings

#TOP1

9.8

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#TOP 2

Men’s Thermal Underwear Pants Base Layer Leggings - Warm Long Johns for Cold Weather, Winter Sports, Running, Hiking, Skiing & Outdoor Activities

9.7

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Men’s Thermal Underwear Pants Base Layer Leggings - Warm Long Johns for Cold Weather, Winter Sports, Running, Hiking, Skiing & Outdoor Activities

#TOP2

9.7

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#TOP 3

Mountain Warehouse Talus Thermal Baselayer Trousers

9.5

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Mountain Warehouse Talus Thermal Baselayer Trousers

#TOP3

9.5

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Top 10 Outdoor Thermal Bottoms for Men

#TOP 1

HYCOPROT Men's Thermal Underwear Trouser Long Johns Bottom Winter Warm Base Layer Sports Pants Thermal Compression Leggings

HYCOPROT

Black

HYCOPROT Men's Thermal Underwear Trouser Long Johns Bottom Winter Warm Base Layer Sports Pants Thermal Compression Leggings for Ski, Outdoors,Hiking (Black, L)

9.8

FTB Score

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Features

4-Way Stretch For Unparalleled Comfort And Mobility - The Thermal Long Johns Feature An Advanced Sewing Technique That Delivers A Comfortable, Contoured Fit. The Excellent Elastic Waistband And Stretchy Fabric Provide A Snug Fit That Enhances Your Range Of Motion, Making You Feel Free And Unrestricted In The Gym, Office, Or At Home.

Windproof Warmth For Winter Activities - HYCOPROT Thermal Long Johns Are Crafted With A Windproof Exterior And A Luxuriously Soft Fleece Lining, Ensuring Optimal Insulation And Warmth For Your Winter Adventures. The Advanced Thermoactive Fabric Technology Not Only Shields You From The Wind But Also Traps Body Heat, Keeping You Toasty Without The Bulk.

Versatile Wear For Daily And Outdoor Pursuits - HYCOPROT Men's Thermal Leggings Are Ideal For A Variety Of Activities, From Gym Workouts To Outdoor Adventures Like Running, Cycling, Hiking, And More. They're Also A Thoughtful Gift For Those Who Work In Cold Conditions, Such As Builders, Roofers, And Outdoor Instructors.

Movement And Muscle Support - Designed To Contour To Your Body's Natural Curves, Hycoprot's Thermal Underwear Offers A Perfect Blend Of Stretch And Support. The Super-Elastic Fabric Ensures A Full Range Of Motion, While The Compression Technology Helps To Prevent Muscle Strain, Keeping You Active And Comfortable Throughout Your Day.

Moisture Wicking And Rapid Drying - Our Thermal Base Layer Compression Leggings Are Engineered With Moisture-Wicking Properties That Draw Sweat Away From Your Skin, Preventing Stickiness And Odor. The Quick-Drying Fabric Ensures You Stay Dry And Comfortable, Whether You're Engaging In High-Intensity Workouts Or Casual Outdoor Strolls.

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#TOP 2

Men’s Thermal Underwear Pants Base Layer Leggings - Warm Long Johns for Cold Weather, Winter Sports, Running, Hiking, Skiing & Outdoor Activities

A ATH COLLECTION

Black

Men’s Thermal Underwear Pants Base Layer Leggings – Warm Long Johns for Cold Weather, Winter Sports, Running, Hiking, Skiing & Outdoor Activities (UK, Alpha, L, Regular, Regular, Black)

9.7

FTB Score

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Features

Moisture-Wicking Mastery - Quick-Dry Technology Pulls Moisture Away From Your Skin, Keeping You Fresh, Dry, And Comfortable Even During High-Intensity Activities.

All-Day Warmth - Our Advanced Thermal Fabric Locks In Heat While Maintaining A Lightweight, Flexible Feel Perfect For Layering Under Any Outfit.

Tailored Design: Special Stitching Techniques Are Used To Stop The Fabric From Ripping Or Tearing, And The Edges Are Cut Smoothly So There Are No Loose Threads.

Soft, Skin-Friendly Feel - Crafted From Premium Materials, The Fabric Is Gentle On Your Skin — No Itching, No Irritation, Just Pure Comfort You'll Want To Live In All Winter Long.

Perfect Base Layer - Ideal Under Jeans, Workwear, Or Snow Gear — Whether You're Running Errands, Hitting The Slopes, Or Relaxing At Home, This Base Layer Keeps You Warm And Ready For Anything.

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#TOP 3

Mountain Warehouse Talus Thermal Baselayer Trousers

Mountain Warehouse

023199005006

Black

Mountain Warehouse Talus Mens Thermal Baselayer Trousers - Lightweight & Breathable Pants - for Camping, Hiking & Outdoors Black XL

9.5

FTB Score

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The Talus Thermal Baselayer Trousers from Mountain Warehouse are designed for outdoor enthusiasts like you. With Isotherm technology, these trousers retain heat while remaining light and comfortable. The moisture-wicking feature actively pulls sweat away from your body, keeping you dry during hikes or camping trips. Additionally, the quick-drying fabric ensures that even if you get wet, the trousers will dry swiftly, making them ideal for travel. Lightweight and easy to pack, these trousers are perfect for any active adventure.

What We Like

Retains heat without weight

Wicks moisture effectively

Dries quickly

Lightweight and easy to pack

#TOP 4

HiFEN Men’s Thermal Long Underwear Bottoms 3-Pack - Warm, Lightweight, Flexible Base Layer Pants Ideal for Winter Wear, Outdoor Activities

HiFEN

Black - 3pack

HiFEN Men’s Thermal Long Underwear Bottoms 3-Pack – Warm, Lightweight, Flexible Base Layer Pants Ideal for Winter Wear, Outdoor Activities, and Daily Comfort

9.4

FTB Score

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Features

Comfortable Stretch Fit:Made With Soft, Flexible Fabric That Moves With You. The Material Isn't Bulky, So You Can Easily Wear It Under Jeans, Joggers, Or Work Pants Without Discomfort.

Reliable Winter Warmth:These Thermal Bottoms Are Designed To Hold In Heat, Giving You A Steady Layer Of Warmth During Cold Mornings, Winter Workdays, Or Outdoor Activities.

Secure Waist & Cuffed Ankles:The Elastic Waistband Stays Comfortable Throughout The Day, And The Ankle Cuffs Help Keep The Bottoms In Place While Locking In Heat.

Ideal Base Layer For Daily Use:Thin Enough For Layering Yet Warm Enough To Make A Difference, These Pants Work Perfectly As Your Everyday Base Layer In Winter.

Durable 3-Pack For All-Season Needs:This Set Of Three Gives You Dependable Options For Regular Wear. They Hold Their Shape After Multiple Washes And Remain Smooth, Warm, And Ready For Daily Use.

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#TOP 5

YUSHOW 2 Pack Mens Thermal Underwear Bottoms Long Johns

YUSHOW

UYM234S-2P-Black-XL

Black

YUSHOW 2 Pack Mens Thermal Underwear Bottoms Long Johns Cover

YUSHOW 2 Pack Mens Thermal Underwear Bottoms Long Johns for Men Thermals Tights Fleece Lined Base Layer Ultra Soft Thermal Trousers Winter Warm Compression Leggings for Cold Weather Black

9.2

FTB Score

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Features

Moisture Wicking & Quick Dry: Mens Thermal Long Johns Feature Breathable And Moisture-Wicking. Smooth And Ultra-Soft Fabric Provides An Extremely Comfortable Touch. Highly Functional Thermal Base Layer Men Compression Leggings With Fleece Lined Draw Sweat Away From Your Skin And Are Comfortable To Be Worn All Day. Providing Maximum Comfort, During Everyday Wear And Outdoor Activities.

Excellent Warmth: Mens Thermal Underwear Bottoms Are Made Of 92% Polyester, 8% Spandex. Soft And Comfy. Lightweight Warm Base Layer Leggings To Reduce The Heavy Clothing Burden And Keeps Your Body Looking Slimmer. Thermal Long Johns For Men Outside Made Of Windproof Thermoactive-Active Fabric And Inner Soft Fleece Lining Locks In Heat Reduces Heat Loss. The Thermal Bottoms For Men Long Johns Keeps You Warm On Cold Autumn Winter Days

Skin-Friendly: Mens Thermal Long Johns Use An Advanced Sewing Technique Provides Super Comfort And Curve Body Fit, Excellent Elastic Waistband And Stretchy Thermal Leggings, Providing A Comfortable Fit, And Enhanced Range Of Motion. It Feels Like As Natural As Your Skin And Provides Maximum Comfort And Softness. Also, A Lightweight Base Layer Is Made With Thermal Technology And A Fleece Blend. Brushed Inner Maximizes The Amount Of Warm Air Held Close To The Skin

Occasion: These Thermal Leggings Men Long Johns For Cold Weather Will Be Great As Ski Thermals, Everyday Thermals Underwear, Pyjamas And Base Layer. Thermal Wear For Men Perfect Choice For All Indoor Or All Outdoor Activities, These Thermals Are Ideal For Hockey, Skiing, Training, Running, Cycling, Work Outside Or Daily Wear, Etc, And Retain Shape Even After Multiple Washes

High Elasticity Thermal Tops: The Thermal Underwear Mens Long Johns Are Made Of A 4-Way Stretch To Enhance Freedom Of Movement. The YUSHOW Thermal Compression Leggings Offer Powerful Support For Your Muscles And Joints. The Maximum Balance Between Freedom Of Movement And Muscles. Long Johns For Men Thermal 2 Pack Suit For Winter Skiing, Cycling, Climbing, Hiking, Fitness, Running And Other Active

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#TOP 6 Best Long Johns Thermal Bottom for Men

Heatwave Men's Thermal Long Johns, Pack of 2

Heatwave Thermalwear

RZKtextile

Black

Heatwave Men's Thermal Long Johns, Pack of 2 Cover

Heatwave® Pack of 2 Men's Thermal Trousers Long Johns Warm Underwear Baselayer Thermals, Large Black

9.1

FTB Score

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The Heatwave Thermal Trousers are an essential addition to your winter wardrobe. This pack of two offers a 0.45 TOG rating, ensuring you stay warm by trapping more air close to your skin. The comfort fit, with its ribbed construction, shapes perfectly to your body contours, providing both warmth and comfort. Available in multiple colours, these thermal trousers are ideal as a baselayer, making them versatile for various outdoor activities or lounging at home.

What We Like

Warm and comfortable fit

Pack of two for value

Effective thermal insulation

Available in multiple colours

#TOP 7

SIMIYA Fleece-Lined Thermal Underwear for Men

SIMIYA

1 Pack Black

SIMIYA Thermal Underwear Mens Long Johns, Thermal Leggings Bottoms for Men, Fleece-Lined Base Layer Trousers for Daily Wear, Winter Outdoor

9.0

FTB Score

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The SIMIYA Thermal Underwear offers exceptional warmth and comfort, making it an essential addition to your winter wardrobe. Lined with soft fleece, these long johns capture body heat effectively, ensuring your legs stay cosy without bulk. The sweat-wicking feature keeps you dry during outdoor activities, so you can enjoy a workout even on the coldest days. Additionally, the super elastic fabric allows for unrestricted movement, while the comfy ribbed waistband ensures a secure fit. These thermal bottoms are perfect for both indoor and outdoor wear.

What We Like

Warm fleece lining

Moisture-wicking technology

Flexible and elastic fabric

Comfortable ribbed waistband

Versatile for various activities

#TOP 8 Best Fleece Underwear for Men

HIPOWER Men's Thermal Fleece Lined Long Johns

HIPOWER

Black

HIPOWER Men's Thermal Underwear Long Johns Bottoms Fleece Lined Pants Base Layer Winter Black Sports Leggings Workout Warm Running Hiking Gym Ski Pajama Trouser(Black L)

8.9

FTB Score

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The HIPOWER Thermal Long Johns are designed to keep you warm during the chilly winter months. Made from ultra-soft micro-fleece fabric, they fit snugly to minimise heat loss while remaining lightweight. The advanced 4-way stretch allows for excellent comfort and movement, making them perfect for activities like running or yoga. Additionally, their moisture-wicking properties ensure you stay dry by quickly drawing sweat away from your skin, providing you with a sense of security in cold weather.

What We Like

Ultra-soft and warm material

Excellent flexibility and comfort

Moisture-wicking for dryness

Versatile for various activities

Suitable for layering under clothes

#TOP 9

WINDCHASER Men's Thermal Underwear Set Long Sleeve Tops Long Johns Base Layer Bottom Fleece Lined

WINDCHASER

Jungle Black.

WINDCHASER Men's Thermal Underwear Set Long Sleeve Tops Long Johns Base Layer Bottom Fleece Lined for Skiing Cycling (Jungle Black., S)

8.9

FTB Score

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Features

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.

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.

SUNDRY OCCASIONS - This Thermal Underwear Men For Cold Weather Is Idea Gear For All Kinds Of Activities, Such As Training, Rash Guard, Running, Squat, Weight Training, Cycling, Yoga, Soccer, Skiing, Snowboarding, Indoor Gym Exercise, Fitness Body Training Etc.

STRETCHABLE & ABRASION RESISTANT - Made Of 92% Polyester And 8% Spandex, This Army Thermal Underwear Designed Using Double-Seamless Technology With Top Quality Thermal Properties. Four-Dimensional Elastic Zones That Provide An Optimised Maintenance Of Muscles And Elasticity Freedom Of Movement.

OUT WEAR SHIRT LEGGINGS - This Thermal Underwear Set Definitely Can Be Wore As An Outdoor Compression Sports Shirt, The Tight Shirt Leggings Set Would Be A Great Gift To Your Boyfriend Or Families For All Seasons. If You Have Any Dissatisfaction, Please Connect Us Freely. We Will Try Our Best To Solve The Problem.

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#TOP 10

DOLCE ENVY Men's Thermal 2 Pack Long John Bottom Trouser Warm Base Layer

DOLCE ENVY

Charcoal

DOLCE ENVY Men's Thermal 2 Pack Long John Bottom Trouser Warm Base Layer for Winter Suitable for Daily Use High-Performance Bottom Trouser (XL, Charcoal)

8.9

FTB Score

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Features

Men's Thermal Bottoms With Heat Preservation Technology Ensure You Stay Warm And Lightweight. Long Johns For Men's Thermal Leggings Provide Excellent Thermals And Wind Protection In Cold Weather, Reducing Heat Loss, And Are Never Cumbersome.

Dolce Envy Pack Of 2 Men's Thermal Long John Bottom Trouser Underwear Is Made Of 50% Cotton, And 50% Polyester. Sizes And Colours: Small, Medium, Large, XL, XXL Black, Charcoal, White

The Mens Thermal Long John Bottom Trouser Are Great Choices For Various Indoor And Outdoor Activities, Like Hiking, Skiing, Jogging, Cycling, Motorcycle Riding, Running, Climbing, Training, Yoga, Snowboarding, And Hunting Or Fishing.

Men's Thermal Base Layer Features Breathable Cotton Polyester Fabric Which Will Absorb Sweat From Exercise Instantly, And Stay Away From Unpleasant Smells To Keep You Dry And Cozy.

Breathable Materials Ensure Optimal Temperature Regulation During Various Activities.Versatile Style Suitable For Both Outdoor Activities And Casual Wear.

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Editor's Notes

During our outdoor thermal bottom for men research, we found 100+ outdoor thermal bottom for men products and shortlisted 10 quality products. We collected and analyzed 66,566 customer reviews through our big data system to write the outdoor thermal bottoms for men list. We found that most customers choose outdoor thermal bottoms for men with an average price of £12.04.

The outdoor thermal bottoms for men are available for purchase. We have researched hundreds of brands and picked the top brands of outdoor thermal bottoms for men, including HYCOPROT, A ATH COLLECTION, Mountain Warehouse, HiFEN, YUSHOW.

Written by

John Zimmer

John Zimmer is a truly professional writer on findthisbest.com. He has specialized in writing content a wide variety of fields for over a decade. Since 2011, he has been using his expertise and extensive experience to write content for online shopping guide websites. In addition to writing for findthisbest.com, he has appeared in publications such as The Spruce, Wirecutter and Bestbuy.