Top 10 Baselayer Top Mens UK – Men’s Thermal Tops

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1. Smartwool

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Smartwool Men's Merino 250 Baselayer 1/4 Zip Charcoal Heather XX-Large Mens

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Smartwool #ad - Odor-resistant. Temperature regulating. Will help keep you cool when your intensity amps up, and its design helps minimize chafing.
BrandSmartwool #ad
ManufacturerSmartwool #ad
Height10.16 cm (4 Inches)
Length5.08 cm (2 Inches)
Width12.7 cm (5 Inches)
Part NumberSW016355010-XXL
ModelSmartwool

2. Thermowave

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XXL, black, Thermowave Xtreme Merino Wool Base Layer Mens, Thermo Shirts for Men Long Sleeve

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Thermowave #ad - It's built to withstand a lot. Even more comfort. Made for better, breathable and odor-free performance. The quality of your merino base layer shirt matters, thermowave Merino Xtreme uses premium class Merino wool sourced from farms in New Zealand, just like the origin of the wool itself.

Made to perform - ½ lockable zip & turtle neck. Perfect choice for busy people who put the quality of their gear first. Being one of the best, doesn't wear out easily, this mens Merino base layer top is machine-washable, and is easy to take care of. The thermowave merino xtreme base layer wicking mens shirt is super soft and, thanks to flat seams - itch-free, suitable for sensitive skin. Made of supreme fabric, 20% polyamide, this 220 gsm merino base layer mens midweight shirt with turtle neck and half-zip features: 80% Merino wool, a mix of natural and man-made materials, 100% polyester inside.

Made in europe, the best wool we have tried. Premium merino wool shirt. Long-lasting quality. A quality long sleeve raglan base layer keeps you warm and dry, but that's not all, right? A good Merino outerwear feels great on you with a lockable half-zipper and extra long neck. This long underwear mens top's snug fit design and extra long back keep you warm no matter what. Next-level merino base layer.
BrandThermowave #ad
ManufacturerThermowave #ad
ModelXTRM451

3. 32º DEGREES

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Stingray, S, 32 Degrees Men’s Heat Performance Thermal Heavyweight Baselayer Crewneck Long Sleeve Fleece Top

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32º DEGREES #ad - Soft micro-fleece on the outside, brushed for extra comfort on the inside. Midweight fleece with a lot of stretch. Meant to be fitted to accommodate wearing under clothes.

Fitted: please refer to photo size chart for chest, waist, hips, and length measurements. Features: quick dry, heavyweight, tag free label. The thermal underwear can be worn as comfy loungewear on cold, Soft Fleece, Fitted, Anti-Static, 4-Way Stretch, chilly nights. Fabric: 94% polyester, 6% spandex. Perfect for everyday comfort at home and winter outdoor activities. Wash care: wash cold gentle cycle with like colors, Do Not Dry Clean, Tumble Dry Low, Non-Chlorine Bleach Only, Iron Cool if needed. Offers full mobility and freedom of movement.
Brand32º DEGREES #ad
Manufacturer32 Degrees #ad
Weight0.21 kg (0.46 Pounds)
Part Number#4302
Model#4302

4. MERIWOOL

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100% Merino Wool Midweight Long Sleeve Thermal Shirt Charcoal Gray, MERIWOOL Mens Base Layer

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MERIWOOL #ad - Men’s size options: XS to 3XL. Exceptional customer care: if your meriwool men’s crew top doesn’t perform to your satisfaction, or replacement. Includes a 1-year limited manufacturer’s warranty, exchange, return it to us within 30 DAYS along with proof of purchase for a hassle-free refund,  which covers manufacturing and material defects.

Package includes: 1 - men’s 250g/m² merino wool thermal crewneck top. Super soft: 100% all natural superfine 18. 5-micron merino wool ensures comfort all day – no itch! eaSY CARE: Mid-weight long sleeve crew top shirt is machine-washable and dryer-safe, so it’s ready when you are for your next adventure. Wicking & odor resistance: merino wool’s natural wicking and odor-resistant properties keep you dry and comfortable while active in cold weather. Through the process of wicking, Merino wool is the most breathable fabric and absorbs moisture better than any other fibers.

Wicking refers to a fabric’s ability to pull moisture away from your body and keep you comfortable. Breathable: keeping you cool in summer and warm in winter, 250g/m2 weight interlock-knit merino wool can be used as a base layer or mid-layer, but won’t weigh you down. Easy care: mid-weight long sleeve crew top shirt is machine-washable on cold setting and safe to tumble dry on low heat, so it’s ready when you are for your next adventure. Washer/dryer safe.
BrandMERIWOOL #ad
ManufacturerMERIWOOL #ad
Weight0.32 kg (0.71 Pounds)
Part NumberLYSB01N985IZ3-SPRTSEQIP
ModelCrewneck

5. HEAT HOLDERS

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Mens Winter Warm Cotton Thermal Underwear Short Sleeve T Shirt Vest Large 41-43" Chest, Charcoal, HEAT HOLDERS

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HEAT HOLDERS #ad - Cotton rich - this cotton rich blend top feel super soft and comfortable no matter the layer. 2 colours - choose from Charcoal or White to wear underneath your clothes. Longer body length - this thermal top has a longer body length so you can tuck it easily under your clothes. Thermal lining - this top has thermal lining to ensure you stay warmer for longer as it retains heat close to the skin. Ribbed construction - the ribbed construction of this thermal underwear has been designed so that it effortlessly shapes to the bodies natural contours.
BrandHEAT HOLDERS #ad
Part NumberHHMTUSSLCHA-mpn
ModelHHMTUSSLCHA-mpn

6. 32 DEGREES

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32 DEGREES Men's 2-Pack Performance Lightweight Thermal Baselayer Crewneck Top, White/Charcoal Heather, Large

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32 DEGREES #ad - Perfect for running, waist, hunting. Wash care: wash cold gentle cycle with like colors, Tumble Dry Low, Non-Chlorine Bleach Only, Do Not Dry Clean, Iron Cool if needed.

Meant to be fitted to accommodate wearing under clothes. Fabric: 40% polyester, 22% rayon, 34% acrylic, 4% spandex. Fitted: please refer to photo size chart for chest, hiking, hips, skiing, and length measurements. Lightweight knit with a lot of stretch. Features: lightweight, anti-static, 4 Way Stretch, moisture wicking, Anti Odor, Tag Free Label. The acrylic blend adds additional lightweight warmth that is comfortable against the body.
Brand32 DEGREES #ad
Weight0.34 kg (0.75 Pounds)
Part Number#9002
Model#9002

7. Odlo

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Odlo steel grey melange, M, Odlo Men Functional Underwear Long Sleeve Shirt ACTIVE WARM ECO

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Odlo #ad - Baselayer and more. For every weather. We use an industry-leading layering technology that we invented 75 years ago. Keeps You Warm. Fast or slow. Enhanced Moisture Management. Outside or inside. To balance the needs of everyday athletes and the planet, ODLO has a stated objective of using 100% sustainable fabrics by 2030 Our functional clothing for active, passionate people is designed inside-out in Switzerland. Soft Touch.
BrandOdlo #ad
ManufacturerOdlo #ad
Height9.1 cm (3.58 Inches)
Length19 cm (7.48 Inches)
Width12.5 cm (4.92 Inches)
Part Number159102
Model159102

8. 32 Degrees

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L, 32 DEGREES Mens Heat Performance Thermal Baselayer Crewneck Long Sleeve Top, Black

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32 Degrees #ad - Fitted: please refer to photo size chart for chest, hips, waist, and length measurements. Features: moisture wicking, Anti Odor, anti Static, 4 Way Stretch, Tag Free Label. Fabric: 40% polyester, 34% Acrylic, 22% rayon, 4% Spandex. Meant to be fitted to accomdate wearing under clothes.
Brand32 Degrees #ad
Manufacturer32 Degrees #ad
Part Number#9002
Model#9002

9. MERIWOOL

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MERIWOOL Mens Base Layer 100% Merino Wool Heavyweight 400g Thermal Shirt for Men Black

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MERIWOOL #ad - Wicking & odor resistance: merino wool's natural wicking and odor-resistant properties keep you dry and comfortable while active in cold weather. 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, skiing, hunting, whether your camping, playing sports, hiking, or partaking in any outdoors activity.

Includes a 1-year limited manufacturer's warranty, exchange, return it to us within 30 DAYS with proof of purchase for a hassle-free refund, which covers manufacturing and material defects. Wicking refers to a fabric's ability to pull moisture away from your body and keep you comfortable. Men's size options: S to 2XL. 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.

Exceptional customer care: if your meriwool men's heavyweight baselayer crew doesn't perform to your satisfaction, or replacement. 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. Package includes: 1 - men's 400g/m² merino wool thermal crewneck top - Black / XL. For best results: hand wash and lay flat to dry.
BrandMERIWOOL #ad
ManufacturerMERIWOOL #ad
Height10.16 cm (4 Inches)
Length24.13 cm (9.5 Inches)
Weight0.51 kg (1.13 Pounds)
Width12.07 cm (4.75 Inches)

10. X-Bionic

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X-Large, X-Bionic Energizer 4.0 Shirt Round Neck Long Sleeves Men Baselayer Functional Sport T-Shirt, Opal Black/Arctic White

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X-Bionic #ad - 100% research, design and communication done in Switzerland, development, made in Italy. The legendary patented 3d bionic Sphere System with thermosiphon technology is more powerful than ever: cool when you sweat, and warm when you are cold.

The result is an ultra-dense knitted fabric that integrates 13 highly effective technologies. The air complex-zone on the upper abdomen and the Air-conditioning Channel with surrounding air Guides support temperature-controlled ventilation under a second layer of Clothing. More than 600 awards and test Wins, over 800 patent registrations worldwide for the brand with the "X".

The functional underwear is manufactured on precision machines using the pioneering Retina process. With its moderate compression, the round neck t-shirt for Men fulfils all the wishes of demanding winter sports enthusiasts who want outstanding wearing comfort and optimizing thermoregulation.
BrandX-Bionic #ad
ManufacturerX-BIONIC #ad
Weight0.28 kg (0.62 Pounds)
Part NumberNG-YT06W19M
ModelNG-YT06W19M