MEN SIZE (USA) S-M SHOE SIZE 5-9 CALF SIZE 9in-15in WOMEN SIZE (USA) S-M SHOE SIZE 5.5-8.5 CALF SIZE 9in-15in Fabric type 85% Nylon, 15% Spandex Care instructions Machine Wash COMPRESSION SOCKS – We intend combining fashion, technology and science to bring you the triple comfort without. The material of our compression socks are upgraded with nylon percentage from 40% to 85%. Delivers 360-degree stretch for greater flexibility and durability. Breathable high performance fabric keeps an optimal temperature. COMFORT – We carefully designed and manufactured our compression socks to provide premium support, comfort, and relief without compromising your mobility. Form fitting, lightweight, and breathable fabric features maintain stability regardless of activity. EFFECTIVE – Our compression socks (15-20 mmHg) are highly recommended by preferred by trainers. These are designed to promote blood circulation and oxygen flow preventing fatigue and helps in muscle recovery. Whether you are an athlete, teacher, flight crew, receptionist, office worker, pregnant, nurturing mother, elderly, our socks are universally suitable for all work. UNISEX – Two size options available to pick from. Best Gift for women, athletes and runners – Anyone on their feet all day. If you are struggling with a gift idea to a loved one or a casual friend, this is will reduce your anxiety without even you wearing them.