Thermal underwear and base layers
How to Choose the Best Thermal and Technical Base Layer?
Visit Glisshop and browse our selection of long-sleeve tops and tights designed to provide maximum warmth. With their snug fit, these thermal base layers act like second skins, quickly forgotten yet delivering exceptional comfort and warmth. Whether you prefer merino wool or synthetic fibres, the choice is yours. Our men’s thermal base layers and women’s thermal base layers are the perfect first layer of protection. Just add a fleece and a technical jacket to be ready for winter.
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Clearance
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Recommended price
£47.85
-27%
£34.71
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- S
- L
- XL
- XXL
Clearance
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Recommended price
£43.41
-20%
£34.71
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- S
- M
- L
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Recommended price
£26.01
-18%
£21.32
The Picture Florianne Poilstrusse women's model is a comfortable, warm and breathable brief that benefits from an eco-responsible design based on recycled polyester only.
- XS
- M
- L
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Recommended price
£56.55
-30%
£39.59
The Falke Longsleeved Shirt Black technical underwear, with its slim fit and recycled materials, optimizes moisture regulation and ensures comfort and freedom of movement.
- S
- M
- XL
- XXL
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Recommended price
£69.51
-30%
£48.63
The Craft Active Extreme X Zip technical undergarment is the ideal partner for all your sporting activities. Thanks to its unique composition and cutting-edge technology, it offers excellent moisture management andoptimum thermal insulation. Its thin, lightweight and elastic fabric adapts perfectly to your body, allowing you to move freely while staying dry and warm. What's more, Craft has taken sustainability a step further by using SEAQUAL polyester, produced from recycled plastic.
Features of the Craft Active Extreme X Zip
- Fine, lightweight, stretch fabric
- SEAQUAL polyester produced from recycled plastic
- Coolmax Air technology
- Waffle knit
- Armpit mesh inserts
- Flatlock flat seams
- Fitted cut
- XL
Clearance
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Recommended price
£65.25
-40%
£39.15
The Craft Adv Warm Intensity Ls Slate Amber is a comfortable, stretchy technical undergarment designed for optimal thermoregulation and freedom of movement.
- S
- M
- L
- XL
Clearance
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Recommended price
£34.71
-30%
£24.27
- 134-140 (8-10 ans)
- 158-164 (12-14 ans)
Clearance
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Recommended price
£65.25
-40%
£39.15
Craft Core Wool Merino Ls Tee Blaze melange is a breathable, lightweight technical undergarment ideal for winter sports, combining warmth and quick drying.
- L
- XL
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Recommended price
£60.81
-30%
£42.54
The Millet Drynamic Warm Tight M Anthracite Grey technical undergarment offers warmth, comfort and freedom of movement for winter treks.
- L-XL
- XXL
Clearance
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Recommended price
£47.85
-36%
£30.45
The Dare2B Exchange IIII Baselayer Set Olivine Green Black is a set of technical underwear made from thermal polyester, offering warmth, comfort and efficient moisture management.
- S
- L
- XL
Clearance
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Recommended price
£121.71
-25%
£91.26
The Eivy Icecold Merino Wool Gaiter Rib Top Black is a comfortable, functional women's base layer, designed with four-way stretch merino wool for moisture-wicking and quick-drying.
- L
Clearance
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Recommended price
£121.71
-42%
£69.51
The Eivy Icecold Merino Wool Gaiter Rib Top is a women's base layer offering comfort, functionality, and RWS® certified quality with its moisture-wicking, quick-drying design.
- S
Clearance
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Recommended price
£52.11
-28%
£37.32
The Falke Long Tight Black is a versatile, eco-friendly base layer offering optimal moisture control, temperature regulation, and freedom of movement for medium to high-intensity activities.
- M
- XL
Clearance
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Recommended price
£33.93
-29%
£23.93
- S
- XL
Clearance
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Recommended price
£52.11
-25%
£38.71
Board for the ultimate sports experience with the Swix Racex Classic Half Zip Technical Undergarment. Designed with athletes in mind, this synthetic base garment from the renowned Swix brand is the ideal ally for all your high-intensity activities. Thanks to its unique composition, it offers optimal freedom of movement while ensuring fast drying. Its neck zipper allows quick and easy ventilation. In addition to its exceptional performance, this undergarment is environmentally friendly, being made from recycled plastic bottles. Wear it and feel the difference!
Swix Racex Classic Half Zip features
- Composition : 70% Repreve® recycled polyester/ 30% Polyester
- Extensible and quick-drying
- Zipper closure for easy ventilation
- Designed for high-intensity training intensity
- Lightweight and breathable
- Made from recycled plastic bottles collected within 50 km of coastlines in countries without formal waste management systems
- L
- XL
Clearance
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Recommended price
£39.06
-25%
£29.23
The La Sportiva Sunfire T-Shirt M is a lightweight, breathable, eco-friendly base layer with efficient moisture wicking, quick drying, and odour-minimising Polygiene® finish.
- M
- L
- XL
Clearance
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Recommended price
£86.04
-30%
£60.23
The Uyn Man Energyon Biotech Uw Shirt Long Black from Uyn is a high-performance technical undergarment that uses natural materials for efficient wicking and optimum comfort.
- S-M
- L-XL
- XXL
Clearance
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Recommended price
£47.85
-27%
£34.71
- S
- M
- L
- XL
Clearance
-
Recommended price
£52.11
-25%
£39.06
- XL
Clearance
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Recommended price
£78.21
-30%
£54.72
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- L
Clearance
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Recommended price
£82.65
-30%
£57.86
The X Bionic Code Invent Fx Pants Men Black Light Grey is a technical base layer for winter sports, offering optimal comfort, body heat regulation, and precise body-mapping.
- S
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Thermal Base Layer Buyer’s Guide
The thermal base layer is the first element of a skier’s or snowboarder’s gear. Acting as a warm and discreet second skin, it ensures all-day comfort. Long-sleeve tops and tights protect you from head to toe—simply layer on a fleece and a technical winter jacket to be perfectly prepared.
There’s a wide range of synthetic and natural materials tailored to all types of sports. Every year, manufacturers compete to develop innovative thermal base layers designed for both skiing and mountain hiking. At Glisshop, you’ll find a full range of thermal base layers and hiking apparel to complete your outfit and enjoy optimal warmth.
Key Features of Cold-Weather Base Layers
Though seemingly minor, the thermal base layer plays a crucial role. It regulates your body temperature and wicks sweat away during activity, ensuring you stay warm even after physical exertion. The textiles used are soft for direct skin contact and highly breathable to promote evaporation. Ideally, the thermal layer should remain dry or dry quickly. To achieve this, major outdoor brands from Chamonix, the U.S., and Nordic countries use advanced synthetic fibres or premium merino wool. For absolute comfort and maximum warmth, choose models with flat, ergonomic seams that won’t cause irritation, even with repeated friction—pure bliss!
Getting the Most Out of Your Men’s or Women’s Base Layer
If you’ve chosen a long-sleeve t-shirt, synthetic tights, or long johns, remember to wash them regularly to prevent odours. As for merino wool garments, they can be machine washed at the end of the week, provided the temperature doesn’t exceed 30°C, and spin cycles are kept gentle. Get the most of your ski season with Glisshop by completing your ski outfit with quality garments from brands like Adidas, Bjorn Daehlie, Bula, Craft, Eivy, Falke, Gore, Icepeak, Kari Traa, Maloja, Odlo, Patagonia, Picture Organic Clothing, Protest, Rossignol, Superdry, and Swix!
What Is the Best Thermal Base Layer: Synthetic Fibre or Merino Wool?
Synthetic fabrics are often lighter than their wool counterparts. They offer comparable breathability and are more affordable. However, while they dry very quickly, they tend to develop unpleasant odours quickly due to perspiration.
Merino wool, known for its softness, has excellent moisture absorption and also dries quickly. Another key advantage is its natural antibacterial property, which prevents the development of bad odours caused by sweat. This makes it an ideal choice for reducing the number of garments needed and wearing the same item for multiple days, particularly useful for trekking. If you’d like to learn more about this material, we invite you to check out our Merino wool guide, where we discuss its advantages and disadvantages in detail.