 This product is designed for those who prefer a moderately thick product. Extra THOR•LON® provides a medium density padding to provide better durability, protection against shock, impact and shear forces. Lightweight padding in arch for better fit and arch support. Flat knit stretch nylon at insep for less bulk and ultimate fit. Content: 73% THORLON Acrylic, 26% stretch nylon, 1% spandex |