Ventilation:Ventilated area on the instep for improved ventilation.Lightweight:63g in size 8/9½.Moisture management:Use of polyester helps wick away perspiration.Quick drying:Air dries quickly.Easy maintenance:Wash inside out at 40°C. Air dry only. Design: These Essential socks were designed to allow football players to fit themselves out at a bargain price, for occasional low intensity use while still providing the essential features needed in a football sock. ECO-DESIGN: Dyeing textiles uses a lot of water, and also produces a lot of waste water from the dye baths.To reduce our environmental impact, we use the "dope" dyeing process where dye is added to the solution from which the thread is manufactured, thus reducing our water and energy consumption and chemical dyeing processes. * Only blue and white colours use the "dope" dyeing process