Assist to Back Flip over Training: Help you ready to flip over training correct your body curve and shape figure Strength Training: Great for musle workouts assist to promoting the body balance training Portable: Easy to carry, you can yoga anytime in the gym, yoga room, and home. Adjustable shoulder strap design, height and angle can be adjusted arbitrarily according to your needs, suitable for the needs of different heights and different groups of people. Develop the flexibility: Adjustable strap length allows your fitness can be proceed in an orderly way according to Specification: Material: Polyester steel buckle Size Chart: 3.8cm/1.50inch 350cm/137.80inch 10cm/3.94inch Package Includes: 1Yoga Stretching Trainer Note: Please allow slightly errors due to manual measurement and different monitors.