Coccyx Gel Seat Cushion w Fleece Top 18 Wx16 D x 3 Back Boards Knee High (Closed Toe) * 151146 Knee High (Closed Toe) * Classic Black * 20 30 mmHg * Large * Ankle Circumerence 9 1 2 10 1 2 * Calf Circumference 14 18 1 2 * * Attractive ribbed design with 3 D knit structure * Easy to wear with a comfortable band that keeps socks up without binding * Flat toes seams and a roomy toe section * Reinforced heels for a longer lasting durable product * Anti bacterial additive reduces unpleasant sock odor * Special Moisture Transport System with soft micro and multi fiber yarns in the sole keeps feet dryer * Latex Free * Color: classic black gradient compression therapy at a price you can afford 16 x 18 x 3 * Cut out relieves pressure on the spine * 3 High density foam with gel pad center * Reduces pressure on the tail bone and spine * Washable navy cover with soft fleece top * Suggested HCPCS code E2601 * 1 year warranty