Compression socks provide 12-15 mmHg, offering a mild graduated compression. Fits calf sizes up to 18 inches comfortably. Accurate fit according to the sizing chart. 60% Polyester 18% Bamboo 15% Lycra 7% Cotton Care Details Wash in cold water on a gentle setting with similar colors. For drying, either hang them up or use a low heat setting in your dryer. To ensure they last longer and maintain their compression effectiveness, steer clear of bleach and do not iron.