Produnct Information Black/Beige XS:30-40 catties S:41-70 catties M:71-135 catties L:136-180 cattie Feature 1.OVERALL CORRECTION--Shoulder Support Brace Pull back your Upper Back to the right position. And then improve your whole body posture during work or life. 2.USE ANYTIME-You can use it not only when you are sitting on computer or driving a car, but also when you are playing sports or gardening. What is more, you can use it at home when you are doing housework, or watching TV. 3.PRACTICAL--Posture brace filed with Lightweight neoprenecan be worn comfortably under or over clothing.Correct your posture all day.You can put on and adjust by yourself. 4.USE DAILY--This lightweight back support should be worn daily. First couple of days wear it for 10-20 minutes only, than add 10 minutes every day. Your back and shoulders will slowly adjust and you will build muscle memory for the right posture.