Icebreaker wool clothing is designed by nature. The merino's light, breathable fibre keeps him cool in the scorching heat of New Zealand's Southern Alps. In winter, he grows an extra layer for warmth. In cold weather, the merino garments use moisture absorbed from the environment to generate heat. Its crimped (wavy) fibres also contain millions of air pockets that lock in body heat to keep you toasty. In warm weather, Icebreaker merino keeps your skin cool by transporting moisture vapour away from the skin to be evaporated. And because Icebreaker merino breathes beautifully, moisture vapour escapes without making you feel clammy.