Six zones of 20-30 mmHg compression help reduce swelling. Gently stretches Plantar Fascia to reduce pain. Wear under socks or overnight. 1 Pr. Washable, latex-free. Choose white or natural. By shoe size: M (Wmn's 7-10.5, Men's 6-9.5), L (Wmn's 11+, Men's 10-13). 24% Lycra Spandex and 76% Micro-Nylon.