Material: Stainless Steel & SpongePPSize:Minimum 54cm/21.2"; Maximum 86cm/33.8"Color:pink/green/blueFeatures:1. One set is more than one set, and the length can be adjusted freely to suit people of different ages.2. Yoga Open Back/Open Back/Humpback Correction/Form Exercise/Posture Correction.3. Are you troubled by the following: 1. Sore neck, shoulders, back and back at work; 2. Long-term bowing and neck bending; 3. Students sitting incorrectly for a long time; 4. Poor hunchback temperament. Works out perfectly after working out with the product.4. Practice 10 minutes a day to shape yourself and improve your temperament from the inside out.5. Compared with ordinary orthodontic straps, our products do not strangle the shoulders, are not stuffy, and are not embarrassing; compared with ordinary open back sticks, our length can be adjusted, the built-in stainless steel is firm and stable, and the outer thickened sponge is soft and comfortable, environmentally friendly, tasteless, and does not hurt hand.NOTE1. As we all know ,the different computers display colors differently,the color of the actual item may vary slightly from the following images.2. If you feel difficult to choose the size ,you can feel free to contact mewe will give you some suggestion,but it is for you reference only.3.We could accept Mixed items,Colors And Sizes Order. The more quantities, the more discount.Package include: 1 pcs* Hunchback corrector