Use these in your boots and shoes for extra padding or in combination with your current insoles. By placing them underneath your shoe's insoles or custom orthodics, you can create a snug fit that is great for those with narrow or low volume feet. Top layer is durable, anti-microbial black polyester nylon and the cushion layer layer is 4mm of high density shock absorbing foam. Imported. Men's shoe sizes S(5-6.5), M(7.8.5), L(9-10.5), XL(11-12), XXL(13-14). Women order S(6-7.5), M(8-9.5), L(10-11).