TeeHee Viscose from Bamboo Footless Compression Sleeve with Rib 3-Pack (Large, Black) 53% Viscose Bamboo, 32%Elastic, 12% Nylon, 3% Spandex Made in USA TeeHee Viscose from Bamboo Footless Compression Sleeve with Rib 3-Pack 8-15 mmHg (Mild Support), As a result, increased endurance and better performance are obtained during any sport activity. Our Graduated Compression Sleeves are designed to stimulate circulation in those areas where gravity has a greater effect on blood return, such as feet and lower legs. Promotes Circulation, Odor Resistant and Wicks Moisture, Prevents Blisters, Comfort Sock, Non-Binding Support to Relieve Leg Fatigue. Sizing Guidelines: Medium(13.5" - 15.5"), Large (15.5" - 17.5") Machine wash warm. Use only non-chlorine bleach when needed. Tumble dry low.