100% Cotton Material : 92%Cotton+5%Polyester+3%Spandex Points: No Show. High Knitting Technology. Ventilation Air Fresh.you can wear it all days for indoor and outdoor activity. The socks are antiskid, comfortable, durable and they wick away sweat. Colors are a good match for all your sneakers, boat shoes, loafers, etc. Size&Washing: US Mens Shoe Size 6.5-10(EUR 39-43),Machine washing. This “no show socks is for sport shoes and most casual shoes, if you wear boat shoes or other very low cut shoes , this socks will not be no show .