This Adult Insole is made of 75% wool, and is 8mm thick. Highly absorbent, these insoles keep feet dry and warm. Available in Adult sizes 7 to 14 in mens sizing. For womens sizes, we recommend to order two sizes down, if you wear a size 9 in US womens, your best fit would be a size 7 US mens. Adjustments can be made to the insole by easily be cutting down to size using a sharp knife and short, frequent strokes.