The Hilly Pulse Compression Sock is built for runners who want to get more from training and recovery. Certified to medical standard BS6612, it's designed to improve circulation and help flush lactic acid both during and after exercise, while also reducing calf muscle oscillation. Made with Tencel for a soft feel against the skin and LYCRA SPORT for a close, comfortable fit, it's a sock that works as hard as you do. Designed and manufactured in the UK by Hilly.