Trekking are warm socks extending above the ankle. They have a reinforced foot area and a reinforced instep area to prevent slipping. They are made of branded material Thermocool, which excels in the ability of thermoregulation according to the intensity of physical activities and thus ensures maximum comfort. - socks designed for long and demanding hiking, where you appreciate the high ability of thermoregulation - double thermoregulation - reinforced foot area - reinforced instep area Trekking socks are made of 37% Thermocool brand material, a specially developed material by Advansa that provides double thermoregulation for a unique feeling of comfort. The material reacts to changes in body temperature due to various demanding physical activities. The Thermocool adapts quickly to the needs of thermal control: it removes sweat, adds a feeling of dryness and at the same time provides a sense of thermal insulation when needed. Thermocool fiber is supplemented with 35% cotton, 25% polyamide and 4% elastane. Material: 37% Thermocool, 35% cotton, 25% polyamide, 3% elastane Sizes: - M (UK 3-6, EU 36-40) - L (UK 7-9, EU 41-44) - XL (UK 10-13, EU 45-48)