Size Chart: Medium: Fits Men's Shoe Sze 6-9 / Women's Shoe Size 6-10 Large: Fits Men's Shoe Size 9-12 / Women's Shoe Size 10-13 Machine Wash Cold with Like Colors. Use Only Non-Chlorine Bleach When Needed. Tumble Dry Low. Wide Cross Stretch Non-Binding Top Non-binding cuff without sagging, Minimal compression so as not to restrict circulation. Seamless Toe / Cushioned Bottom The seamless toe provide the smoothest toe seam possible and it eliminates toe irritation and abrasion.Cushioned toe and heel provide extra protection, so comfortable. Easy To Put On and Sag Resistant Loose fitting top, easy pull up leg with enough stretch so it will not sag. It will stay in place on your leg without leaving any marks. Mesh Breathable & Moisture Wicking The mesh design at the instep can release the heat and keep your feet dry & fresh whole day. Running Socks Yoga Socks Thin Non-binding Top Socks Thermal Socks Thick Cushioned Wool Running Socks Cushioned Running Socks Fabric Coolmax Combed Cotton Combed Cotton Acrylic Merino Wool Combed Cotton