These are the compression socks made with aluminized thread that reflect your body heat. The socks provide graduated compression of 20-30 mmHg helping improve circulation, reduce swelling, and provide relief for tired and achy feet. They also feature convenient side zippers that make them easy to put on and remove, even for those with limited grip strength. Open-toe construction allows wiggle room for those with podiatric issues and the socks have a reinforced foot for superior comfort and durability. Imported. Hand wash. Unisex sizes S/M (5 1/2"-8 1/2" ankle, 7 1/2"-14" calf) or L/XL (6"-10" ankle, 9"-16 1/2" calf); if in-between sizes, order the next size up. Two pairs. Black. Open Toe.