The cushioned insole is made with aerogel, an advanced nanoporous material developed for NASA for use in space suits and the space shuttle. The aerogel insulator in the insole forms a barrier that blocks both cold and heat, keeping your feet at a comfortable temperature any time of the year. The insole is thin enough to wear in most shoes and boots.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.