Hilly knows a thing or two about a great pair of socks. The Active pair is the latest example to be plucked off the brand's rails. These socks have been carefully crafted with running in mind thanks to their mid-level anatomic cushioning, and they keep your feet fresh thanks to ventilation and odour control._Min-Level Cushioning Polyamide HeelVented Upper Arch Grip Flat Under Toe Construction Comfort Tabs Material Composition - 80% Polyamide (Nylon), 17% Polyester, 3% Elastane (LYCRA SPORT)._