Features: 100% brand new and high quality. Can effectively correct your back shape. Correct your sitting posture, good for health. Make you taller and straighter. Item type: magnet back support Material: nylon+polyurethane Color: white, black Gender: unisex Function: correct Size: S, M, L, XL Note: Size is smaller, we recommend you choose a larger size. Package includes: 1 x magnet back support