About the product:1. Posture Correct - Our posture corrector is made with humanized design, give you the proper 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 & suede fabric with honeycomb holes design, more breathable, curved plastic back plate deign with good plasticity, perfect fit. Soft chest pad makes you more comfortable. Finger pull ring design, adjustable easy to wear.5. Pulley design can easily fixed lumbar vertebra, quicker and effortless. lengthen design comprehensively correct and protect your spine, does not affect chest and abdominal breathing, no limiting to the motion of the shoulder and hands. Synchronous gear design makes your shoulders even by force.Material: velvet & suede & plasticColor: blackSize:S: suit for abdominal circumference 60-75cm/24-30inchM: suit for abdominal circumference 75-90cm/30-35inchL: suit for abdominal circumference 90-105cm/35-41inchPackage include: 1Pcs * Posture Corrector Back BracesCycle of usage:1.The first week: Vertebral adaptation period, can not be too loose or too tight.2.The second week: Adjust the tightness slightly, makes your spine get used to it.3.The third week: Suggest wearing two hours every day!