Kenetrek Supportive Insoles - The Kenetrek Supportive insoles are a four piece, three layer insole that features anti-microbial pads that help with preventing odor and pulling moisture away from your foot. Under that there is a silicone gel insert to provide cushion to the ball of your foot with a firm, supportive base layer to give you all day comfort. Four piece, three layer insoleAnti microbial pad4mm high density moldable foamSilicone gel insert to cusion ball of footMen's shoe sizes: S(5-6.5), M(7-8.5), L(9-10.5), XL(11-12), XXL(13-14)