The WALKING sock is designed for fitness walking and casual dress. The outer layer of the sock is hi-bulk acrylic which allows for a sock in rich colors while keeping the inner layer white for a healthier fabric against the foot. The inner layer is constructed of Coolmax® to keep feet drier and cooler by wicking the moisture away from the foot into the outer layer. The two layers of material move slightly to absorb friction. The combination of a colored outer layer and the Double Layer construction make this an ideal sock for casual wear. Fabric: Inner Layer 70% CoolMax®, 30% Nylon Outer Layer 68% CoolMax®, 28%Nylon, 4% Lycra® Color: White