The Oktiv Coolmax® Thick Socks are built to dry fast and deliver exceptional breathability to keep your feet cool and dry. With thick, articulated padding, they bring ultimate protection and comfort. Coolmax® fabric construction keeps feet cool and dry Thick construction for a more secure and comfortable fit Arch support Blue: 46% acrylic / 37% nylon / 8% Coolmax / 6% polyester / 2% cotton / 1% elastane Black: 37% acrylic / 34% nylon / 12% polyester / 7% Coolmax / 6% cotton / 3% rayon / 1% elastane Flo Red: 46% acrylic / 34% nylon / 7% Coolmax / 6% cotton / 6% polyester / 1% elastane