Li-Ning Men's Sports Socks Free Size AWLN065 Material Composition: 70% Cotton 14% Elastane 8% Spandex 8% Nylon Free Size Care Instructions: Machine wash cold, Do Not Bleach, Do not Iron Do Not Dry Clean, Do Not Tumble Dry. Engineered Zone Arch: For Stability and support. Achilles Protection: For Protection in Critical Friction zone and higher protection. Reinforced Cuff: Keeps socks in place without compression. Mesh Vent Structure: Aids Rapid Moisture Transportation and breath ability. Arch Band Support: To promote Anti-Slipping or bunching under the foot. Reinforced Toe: Fore Contoured fit and reduces slippage. Specially Heel Pocket: Locks sock heel in place. Cushioned Sole: Protects and helps absorb pressure to guard against impact abrasion. Messaging Sole Arch: For Extra Support to prevent sock from slipping underfoot.