Move a little quicker in the Magic Dual Layer Reversible running sock from New Balance. This reversible sock white or black is built with double-layer construction for abrasion resistance. Arch support included for stability and comfort. Product features include: Black layer: 70 percent Sensura polyester, 27 percent nylon, 3 percent spandex, White layer: 70 percent Tactel nylon, 25 percent nylon, 5 percent spandex, Pre-pack of six pair, Lightning Dry technology.