Polar Feet Warm Fleece Tabi Socks for Men and Women Camping, running, hiking--wear your sandals and be warm! Washer and dryer friendly. Fleece won't mat, pill, shrink or fade. Long-lasting and durable. Available in Small (W 6-7.5, M 5-6), Medium (W 8-9, M 7-8), Large (W 10+, M 9-11), and Extra-Large (M 12-13). Sizing may run a bit small. If you aren't sure, round up rather than down. Made in Canada. Also great for wearing around the house--just slip on your flipflops and head outside.