Vibram Men's V-Run Running Shoe 100% Textile and Synthetic Imported Synthetic sole Please be aware this product runs one size large. Please size down 1 size from your normal VFF size Vi-lite midsole with XS run outsole rubber compound provides the perfect blend of cushioning and durability Adjustable pull tab and cord closure Mass perforations in the upper breathe fresh air into smoother fabric for added comfort XS run compound at toes and heel for extra support and Anti-microbial drilex sock liner