Outrun the competition with the blister-free fit and comfort of the DL FUEL Lo by Wrightsock. Sold in a three-pair pack. Interaction between the two layers helps absorb friction to prevent blisters. Trapped air between the layers helps create insulation from heat and cold. Cushioned footbed for excellent impact protection and comfort. Medium weight Dri-WRIGHT II keeps your feet cool and dry. Seam-free construction for smooth and comfortable toe area. Y-heel promotes anatomically correct fit. Stabilizer Zone enhances performance fit. Materials: & amp #8226 Inner layer: 66% Dri-WRIGHT II polyester, 30% nylon, 4% lycra. & amp #8226 Outer layer: 68% Dri-WRIGHT II polyester, 24% nylon, 8% lycra. Machine wash warm and tumble dry low. Made in the U.S.A.