The COOLMESH® sock is the lightest and most breathable Double Layer sock ever. Both layers are constructed of Coolmax® to keep feet drier and cooler. The outer layer contains a mesh panel to allow more air flow for even cooler feet without compromising the Double Layer benefits. The two layers of material absorb friction with the slight movement between the layers. The outer layer is constructed of assorted colors from basic to bold allowing a more colorful look while the inner layer remains white and undyed for a healthier foot.