Thermal Underwear

Underwear for clothes and winter sports

Underwear for clothes and winter sports forms the foundation of your layering system when skiing, snowboarding or being active in cold weather. It helps keep you dry, warm and comfortable, even when your heart rate rises. In this category, you’ll find carefully selected models designed for winter sports and outdoor activities.

The purpose of functional underwear is to wick sweat away from the skin and regulate body temperature so you don’t freeze on the lift or overheat on the way down. That’s why material, fit and thickness are more important than colours and prints when choosing your set.

Materials, fit and layering

The main choice is often between wool, synthetic fibres or a blend. Merino wool is naturally temperature-regulating, odour-resistant and warm even when damp. Synthetic fibres like polyester and polyamide are lightweight, highly moisture-wicking and quick-drying. Many modern sets combine the best of both worlds.

Underwear for winter sports should fit close to the body without feeling tight. A snug fit improves moisture management and makes it easier to build additional layers, such as a mid-layer and a shell jacket. Also consider whether you prefer a thin all-round set for active use or a slightly thicker one for extra warmth on cold days.

When choosing, you can look for:

• Material: Pure merino wool for maximum comfort and odour resistance, or synthetic for quick drying and low weight.
• Thickness (g/m²): Lightweight fabrics for high activity and spring/autumn use, heavier yarns for frost and low temperatures.
• Fit: Close-fitting and elastic so the fabric follows your movements without bunching or causing friction.
• Seams and details: Flat seams, soft labels and wide elastics reduce irritation during a full day of activity.
• Layering use: Consider whether the set will mainly be worn under ski clothing or also for daily use under regular clothes.
• Care: Check the washing instructions; wool requires gentle detergent and a lower temperature than purely synthetic underwear.

With the right choices, your underwear will last longer, and you’ll get more out of both your ski holiday and other winter adventures in the cold. Choose the models that suit your activity level and temperature preferences, and build your personal layering system from there.