Feetures Elite Ultra Light Cushion No Show Tab Nylon Anatomical right and left foot design enhances fit, delivering maximum protection by helping to eliminate blisters. iWick fibers wick moisture to keep feet dry and odor-free. The PerfectToe (No irritating toe seam.) Ultra thin construction takes up minimal room inside the shoe. 79% iWick Nylon, 13% Polyester, 8% Lycra Spandex