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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Recommended price
£46.75
-27%
£33.92
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- S
- L
- XL
- XXL
Clearance
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Recommended price
£46.75
-27%
£33.92
- S
- M
- L
- XL
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Recommended price
£46.75
-27%
£33.92
- XS
- L
- XL
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Recommended price
£39.02
-20%
£31.02
The Damart Sport Comfort Thermolactyl 4 Col Zippe Noir is a lightweight, warm, and eco-friendly base layer, perfect for cold-weather outdoor activities.
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- XXL
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Recommended price
£25.41
-33%
£16.91
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.
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- S
- M
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Recommended price
£46.75
-27%
From £33.92
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Recommended price
£33.92
-30%
£23.72
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- 134-140 (8-10 ans)
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Recommended price
£80.75
-21%
£63.75
- M
- L
- XL
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Recommended price
£50.91
-28%
£36.47
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.
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- XL
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Recommended price
£33.15
-29%
£23.37
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- XL
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Recommended price
£46.75
-30%
£32.64
The Swix RaceX Classic technical undergarment is a major innovation from the Swix brand. Designed specifically for men, this long-sleeved top features an eco-friendly composition, being made from 70% recycled materials. The RaceX Classic offers a fitted and ergonomic cut, guaranteeing optimal comfort during sporting activities. Its design allows unhindered freedom of movement, while ensuring effective thermal regulation. It dries quickly, so you're guaranteed to stay dry throughout your activities.
Swix RaceX Classic features:
- Composition: 70% Repreve recycled polyester, 30% polyester
- Extensible and quick-drying
- Round-neck opening
- Extendable cuffs
- L
Clearance
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Recommended price
£46.67
-25%
£34.85
The Swix RaceX Classic technical undergarment is a major innovation from the Swix brand. Designed specifically for men, this long-sleeved top features an eco-friendly composition, being made from 70% recycled materials. The RaceX Classic offers a fitted and ergonomic cut, guaranteeing optimal comfort during sporting activities. Its design allows unhindered freedom of movement, while ensuring effective thermal regulation. It dries quickly, so you're guaranteed to stay dry throughout your activities.
Swix RaceX Classic features:
- Composition: 70% Repreve recycled polyester, 30% polyester
- Extensible and quick-drying
- Round-neck opening
- Extendable cuffs
- L
Clearance
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Recommended price
£42.41
-20%
£33.92
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- XS
- S
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- L
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Recommended price
£33.92
-30%
£23.72
The Craft Core Dry Active Comfort Knickers Black is a versatile technical undergarment offering thermoregulation and comfort for a variety of sporting activities.
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Recommended price
£33.92
-30%
£23.72
- 122-128 (6-8 ans)
- 134-140 (8-10 ans)
- 158-164 (12-14 ans)
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£46.75
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.
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Recommended price
£71.31
-30%
£49.92
The Uyn Man Energyon Biotech Uw Pants Black technical underwear from Uyn optimizes your comfort with high-performance biomaterials and innovative technology.
- S-M
- L-XL
Clearance
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Recommended price
£46.67
-25%
£34.85
The RaceX Classic Pant from Swix is an essential piece for men seeking optimum performance. Made from 70% recycled materials, these technical pants combine ecology and functionality. Its high stretch ensures unparalleled freedom of movement, while its quick-drying capabilityguarantees continued comfort, even after intense exertion. What's more, the crotch gusset enhances the pants' flexibility, and the soft elastic waistband allows a perfect fit at the waist.
Features of the Swix raceX Classic Pant:
- Composition: 70% Repreve recycled polyester, 30% polyester
- High stretchability
- Fast drying
- Gusseted crotch
- Flexible elastic waistband
- M
- L
Clearance
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Recommended price
£33.92
-20%
£27.11
The Damart Sport Collant Comfort Thermolactyl 4 is a lightweight, warm, and comfortable thermal base layer, perfect for outdoor activities in harsh conditions.
- S
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Recommended price
£42.41
-20%
£33.92
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- XL
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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.