This Adult Insole is made of 80% wool, and is 13mm thick, suitable for extreme cold conditions. Highly absorbent, these insoles keep feet dry and warm. Available in Adult sizes 6 to 14 in men’s sizing. For women’s sizes, we recommend to order two sizes down, if you wear a size 9 in US women’s, your best fit would be a size 7 US men’s. Adjustments can be made to the insole by easily be cutting down to size using a sharp knife and short, frequent strokes.