MATERIAL: Tube and Upper – 93.1% polyester, 6.9% spandex; Toe and Heel – 53% COOLSUN, 34.7% nylon, 10.8% polyester, 1.5% spandex; Sole – 34.5% COOLSUN, 22.5% nylon, 41% polyester, 2% spandex. SIZE CHART: Medium size fits women 6-9, and Large size is suitable for men 7-12. MOISTURE WICKING: MEIKAN Wild Sports Socks are designed with breathable mesh ventilation construction to wick sweat away from your skin, and keep your feet cool and dry during sports and exercise. COOLSUN fabric keeps your feet from sweat and odor. MEIKAN Performance Athletic Socks are ideal for running, hiking, trekking, trail running, climbing, tennis, basketball, cycling and other outdoor activities. COMPRESSION SUPPORT: MEIKAN Crazy Running Compression Sock is manufactured with a special structure which applies pressure in multiple directions to wrap the foot and avoid uncomfortable wearing. The elastic arch compression support further minimizes friction and produces a fantastic sense of stability to control your stride. SOFT CUSHIONS: MEIKAN Funky Quarter Socks are extra padded on the toe, sole, heel and ankle, which provides abrasion protection and soothes aching muscles even under the toughest condition. The cushion on the ankle helps avoid injury caused by friction between the ankle and sneaker??s tongue. PERFORMANCE COMFORT FIT: Smooth toe seam eliminates bulky seams to reduce abrasion and provide extra blister protection. Deep heel cup style with full wrap prevents your socks slipping into your boots or shoes. Specific left and right design fits your feet perfectly with added comfort. Single ribbed top not only keeps the socks stay in place, but also effectively avoids unraveling of the stitching.