Anti Embolism Stockings are Knee Length Box of 12 pairs of knee length, size extra large, long leg length EMS compression stockings for those with a calf circumference of 16 inches to 19 inches and a leg length of 18 inches to 20 inches. Gradient pressure is 18 mmhg at the ankle with a gradual reduction to 16 mmhg. Designed by leading medical specialists, Medline EMS or TED stockings give a contoured fit with gradient pressure designed to keep blood and lymphatic fluid flowing in those who are bedridden or do little walking. These EMS stretch anti embolism stockings concentrate pressure at the ankle with gradient pressure that progressively decreases throughout the leg. Construction is 95 per cent nylon and 15 per cent spandex. Knee length, box of 12 pairs by Medline Industries. This item ships from a separate warehouse and may require extra time for delivery.