Keep Jack Frost at bay with Trespass' range of thermal underwear for girls. No one wants to feel the chill on the ski slopes, so add our thermal sets to your kid’s layer system. Thermals work as the perfect base layer, as they trap in body heat and feel great against the skin. Not got a skiing trip planned? No Problem! Wear our thermals here for added warmth during the winter.
What does thermal underwear do? Thermal underwear is excellent at trapping in body heat to keep you warm in very cold temperatures. Fabrics such as merino wool and polyester is often used for thermal underwear and base layers, as it can retain heat and absorb sweat, while still allowing the skin to breathe - this is important for maintaining comfort and avoiding over-heating.