Feature 1Super elasticity, can effectively open the shoulders, breathable and compact, and will have no fat feelings when wear under your clothes. 2The design of two shoulder straps will gently pull the shoulders back to straighten the neck and head, which will greatly improve your bad habits.. 3Provide support for the shoulders and back, help prevent bad posture and spine bending. 4Correct bad posture to maintain the correct sitting, standing and walking posture. 5Suitable 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. .Item Type: Posture Correction Belt Material: 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. Size Suitable Height Suitable Weight M 150-165cm/59.1-65in 40-55kg L 160-170cm/63-66.9in 45-60kg XL 165-180cm/65-70.9in 50-70kg XXL 170-185cm/66.9-72.8in 55-90kg Package List:1 x Posture Correction BeltNote:1. Please wear it for 1& 8209;2 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.