Tilley guarantee these socks “to last 3 years, to dry overnight, and to please you, or your money back.” They are comfortable, quick-drying, moisture-wicking and durable. Wash them in the sink in the evening, and they’ll be dry by morning. Ankle length socks with exterior toe seam to prevent rubbing, comfortable non-slip ribbed top, ribbed arch support and moisture escape panel. Sizes: Medium fits women’s size 4-7 1/2. Large fits men’s size 8-11 1/2.