Collection of girls thermals and base layers that are all suitable for skiing. Not all general thermals are suited to skiing as the long hours on the slopes generates a lot of heat and moisture, which if not wicked away and leave children chilled. Look for polyester or a high content of merino wool and avoid cotton! Odlo, Icebreaker and Reima have a range of warm merino skiing thermals which have natural anti-bacterial properties too. Steiner Base Layers and Trespass use polyester for its fast wicking properties and Helly Hansen invented their own, LIFA technology which they use in children's thermals.