Features:ADJUSTABLE SIZE--4 Size Available.Figure 8 Back Posture Corrector with breathable and latex-free adjustment strap.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.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.PRACTICAL--Posture brace filed with Lightweight neoprene,can be worn comfortably under or over clothing.Correct your posture all day.You can put on and adjust by yourself.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. Descriptions: Easily get perfect confident posture - start standing, sitting much straighter.Align your shoulders, spine and upper back.Improve posture & reduce slouching immediately with easily adjustable dual strap design.Lightweight padded neoprene corrector can be worn comfortably under or over clothing.Eliminates neck and back discomfort from sitting with rounded shoulders in front of the computer.Wear all day to retrain your posture- it's nearly invisible when worn under a shirt.Size Chart:XL: Chest size: 119 - 150 cm / 47 - 59 inch(Suit for weight: 90-100KG)