The Evolution Waterproof socks are 100% waterproof and have been thoughtfully designed to feature a comfortable, breathable, stretchy, waterproof-bonded membrane to keep you warm and dry in very wet conditions. Features: Extremities X-Dry waterproof fabric: A water-resistant shell that repels water particles away from the fabric, using the waterproof and breathable X-Dry membrane, whilst retaining heat Designed for tough conditions, the Evolution waterproof socks are durable and able to withstand harsh environments Seamless construction for ultimate waterproofing and extra comfort Designed with comfort in mind, with a soft, warm, close to the skin layer Ideal for cyclists, runners, and everyday use in wet weather Sizing: Small: UK 3-5 Medium: UK 6-8 Large: UK 9-11 XL: UK 12+ Materials: Outer: 90% Nylon, 10% Lycra Inner: 85% Odor resistant yarn, 8% Lycra, 7% Nylon