This innovative insole combines superior shock adsorption with specialized insulation technology. The insole contains aerogel, an advanced nanoporous material, developed for NASA for use in space suits and the space shuttle. The aerogel insulator blocks the cold keeping feet comfortable and "toasty warm." The extra cushion model is perfect for boots where you have extra room and need extra comfort.Men's insoles fit sizes 8-12Women's insoles fit sizes 7-10 Adult Men’s and Women’s Shoe Size Conversion Table M/W indicates Men's or Women's Sizes. Other systems are for either gender. System Sizes System Europe 35 35½ 36 37 37½ 38 38½ 39 40 41 42 43 44 45 46½ 48½ Europe Japan M 21.5 22 22.5 23 23.5 24 24.5 25 25.5 26 26.5 27.5 28.5 29.5 30.5 31.5 Japan M W 21 21.5 22 22.5 23 23.5 24 24.5 25 25.5 26 27 28 29 30 31 Japan W U.K. M 3 3½ 4 4½ 5 5½ 6 6½ 7 7½ 8 8½ 10 11 12 13½ U.K. M W 2½ 3 3½ 4 4½ 5 5½ 6 6½ 7 7½ 8 9½ 10½ 11½ 13 U.K. W Australia M 3 3½ 4 4½ 5 5½ 6 6½ 7 7½ 8 8½ 10 11 12 13½ Australia M W 3½ 4 4½ 5 5½ 6 6½ 7 7½ 8 8½ 9 10½ 11½ 12½ 14 Australia W U.S. & Canada M 3½ 4 4½ 5 5½ 6 6½ 7 7½ 8 8½ 9 10½ 11½ 12½ 14 U.S. & Canada M W 5 5½ 6 6½ 7 7½ 8 8½ 9 9½ 10 10.5 12 13 14 15.5 U.S. & Canada W
Adult Men’s and Women’s Shoe Size Conversion Table
M/W indicates Men's or Women's Sizes. Other systems are for either gender.