Features: Durable pose trainer material: Our straight back is made of high-quality wear-resistant stitching, washable and soft to the touch. There are ventilation holes on the shoulders. You can maintain breathability and comfort anytime, anywhere, even if it helps you correct your posture without pressure. Adjustable posture correction size: Our back bracket is equipped with an ultra long high-quality Velcro strap, which is adjustable in size and can be easily put on and off without assistance. Suitable for different body types, men, women, old and young, fat and thin (suitable for height 155-190, weight 40-95 kilograms), easily meeting the needs of most people. Shoulder strap posture correction: Our posture correction device can extend the shoulders and is a type of back support. It can improve hunchback caused by poor posture and tilt the neck forward. Keep your shoulders and spine straight in daily life. You can work and learn with a more confident attitude anytime, anywhere. Back straight rod fixator relieves muscle soreness: If you frequently experience neck, shoulder, and back pain while working or studying, you can try our straps. Proper posture adjustment and shoulder stretching can reduce pressure on important areas. Relieve the burden on the back and neck. There is also pain in the collarbone. Attention: Due to manual measurement, please allow for a slight error. Please make sure you don't mind before bidding. 2. Colors may vary depending on the monitor, please understand. Hello, please pay attention to your shipping address when purchasing products. If your delivery information (such as name, street, house number, doorbell/email without name, etc.) is incorrect, the order will not be delivered correctly Color: Black Dimensions: S, M, L, XL (optional) Packaging includes: 1 * correction tape