Feature:1. Super elasticity, can effectively open the shoulders, breathable and compact, and will have no fat feelings when wear under your clothes.2. The design of two shoulder straps will gently pull the shoulders back to straighten the neck and head, which will greatly improve your bad habits..3. Provide support for the shoulders and back, help prevent bad posture and spine bending.4. Correct bad posture to maintain the correct sitting, standing and walking posture.5. Suitable for people with back muscle fatigue and shoulder pain caused by standing for a long time, sitting for a long time, and keeping the posture unchanged for a long time.Specification:.Item Type: Posture Correction BeltMaterial: Composite Cloth + Elastic BeltWear Steps: Put the belt on the shoulder, raise your head, and then pull the chest strap tight and stick it on the chest.SizeSuitable HeightSuitable WeightM150-165cm / 59.1-65in40-55kgL160-170cm / 63-66.9in45-60kgXL165-180cm / 65-70.9in50-70kgXXL170-185cm / 66.9-72.8in55-90kgPackage List:1 x Posture Correction BeltNote:1. Please wear it for 12 hours for the first time, and then gradually extend the wear time. Do not use it during exercise, sleep and after meals.2. Adjust the tension when wearing for a long time. Don't pull it too tight.3. Please wear it over your underwear.