Product Description Size: S; M; L Colour: Black Material: Neoprene Package content: 1*back orthosis 1.ALL DAY COMFORT: Sleek and lightweight. Our back brace can be worn over or under your clothes. No need to feel self-conscious about wearing our brace. You can wear it while at work, home or out and no one will know you have it on. 2. BACK POSTURE CORRECTOR: The adjustment range of the back support shoulder straps is 25 - 43 inch. Posture brace for women & men. Flexible enough to allow FREE MOVEMENT, this approved shoulder corrector provides RELIABLE BACK SUPPORT at all times. 3.LONG TERM IMPROVEMENT GUARANTEE: Start with 15-30 minutes a day and gradually correct the posture. Please have in mind that this device must be worn for a longer period of time before you can notice improvements with your posture. After 2-4 weeks you will notice the first changes to your posture guaranteed. 4.GOOD POSTURE IS HEALTHY AND SEXY FOR MEN & WOMEN: Wearing our back brace for some time develops muscle memory which means youll keep & hold back straight even without the posture corrector device and you will look more confident than ever before. 5.BACK, SHOULDER AND CLAVICLE SUPPORT & PAIN RELIEF: Designed to put an end to the nasty upper and lower back, shoulder and neck pain. Usually, your back, shoulder pain has been caused by your bad posture. This effective back straightener gradually retrains your stiff muscles and adjusts your shoulders to achieve improved posture and proper alignment.