Back Lumbar Support Cushions Package Include: 1Piece x Back Posture Corrector Braces Size Chart: S - -Suit for height: 140-160cm or 55-63inch Suit for waist:51-79cm or 20-31inch M - -Suit for height:160-175cm or 63-69inch Suit for waist:79-99cm or 31-39inch L - -Suit for height:175-185cm or 69-73inch Suit for waist:94-104cm or 37-41inch XL - -Suit for height:185-190cm or 73-75inch Suit for waist:104-129cm or 41-51inch Specifications: 1. Name: Back Posture Corrector 2. Material: velvet and aluminum alloy and pe plastic 3. Color: Black 4. Weight: 785g 5. Size: S, M, L 6. Suit for: Teenagers andAdults Scope of application: 1. Fractures and bone collapse caused by lumbar spine and lumbar spine osteoporosis 2. Kyphosis with chronic back pain 3. Teenagers humpback , correct bad posture About the product: 1. Posture Correct - Our posture corrector is made with humanized design, give you the pr compression to you back and waist which is so helpful to prevent humpback or posture correction, helping you stand taller and straighter. 2. Suitable For All Genders - The whole family can benefit from this posture corrector that is fully adjustable and designed to fit all genders. Effectively get rid of shoulder, back, and neck pain from sprains, muscle spasms, and strains. 3. Body shaping-This back brace also can be used to shape your body freely according to your own conditions, which makes you look more slim, long time use even can lose your fat of abdomen, it is light weight and thin, Invisible can be worn as underwear. 4. Made of breathable velvet fabric, aluminum alloy holder with good plasticity, easy to wear. Detachable soft chest pad makes you more comfortable, easy to clean. 5. BACKPACK design-with humanized backpack design, does not affect chest and abdominal breathing, no limiting to the motion of the shoulder and hands.