Polar Feet Adults' Non-slip Fleece Socks for Men and Women Slipper socks with non-slip grippy paws on the soles. Available in Small (W 6-7.5, M 5-6), Medium (W 8-9, M 7-8), Large (W 10+, M 9-11), Extra-Large (M 12-13) and selected styles XXL (M 14-15). Polar Feet fleece won't fade, mat, pill or shrink. And fleece is hypo-allergenic, so it pretty much gets rid of foot odor, too. Sewn with flat-lock seams. No bunching or pinching. Long-lasting and durable. Suitable for those with circulation problems or sensitive skin. Just toss in the washer and dryer. Made in Canada.