Zeta Sleeves for extra-wide plus size calves are engineered and designed in the USA. They are softer and thicker than standard compression socks/sleeves. This makes them easier to get on and off. They will still provide the same compression but will not feel as "tight" on your legs. The graduated compression helps prevent and alleviate; Varicose veins Deep vein thrombosis Edema Zeta Sleeves can be machine or hand washed with a mild/delicate detergent. The washing water temperature is important to keep within the range, typically between 87f and 104F.