3-D knit structure using air covered spandex yarn that is soft to touch and comfortable for all day wear. Reinforced heel, designed for long lasting durability. Relief is appropriate for use by both men and women. Compression 20 to 30 mmHg. Large compression stockings have closed toes and fit ankle circumferences 10 to 11-3/8 inches with calves between 12-1/2 to 18-1/8 inches in circumference.