Jobst® Relief® Knee High Compression Stockings, Medium, 1 Pair Knee Supports Braces Knee Hi * Espresso * Nasal Cannulas Knee Hi * Espresso * 20 30 mmHg * X Large * Ankle Circ 11 1 2 13 Calf Circumference 13 3 8 19 5 8 * Beautifully sheer hosiery Durable long lasting * Sandalfoot styling * Gradient compression for relief and prevention of venous disease * Therapeutically effective sheer lightweight and fashionable * When you are out of the preset zones the training computer will give a visual and audible alarm * HRmax (user set) * Manual target zone : bpm % * This feature enables you to define the target zone as you want and is suitable for your training Circumference: Ankle 8 3 4 to 9 3 4 inches 20 to 30 mmHg compression rating