Graduated compression speeds blood flow by providing the most compression at the ankle and gradually diminishing pressure up the calf. Helps reduce the formation of blood clots. Soft, durable materials for outstanding comfort and fit. Designed for the post-operative patient. Helps prevent edema, leg discomfort and deep vein thrombosis (DVT). Latex free materials. Size large fits: 29""""- 33"""" heel to thigh length, 15""""- 17.5"""" calf circumference. Moderate 18mm/Hg compression.