[Easy Adjustment Curl]Our hamstring strap adopts heavy-duty mountain-climbing adjustment buckle, which not only increases portability, but also improves the safety of use. It helps to improve the strength of the hamstring muscle, and can also help you recover from the hamstring tendon problem, improve sprint and overall stability. [Multifunctional Home Gym Equipment] hamstring curl strap is suitable for sit-ups, core training, rolls, Spanish squats, core twists, etc. You can prepare soft cushions such as foam mats, yoga mats or pillows during your training to prevent knee pain. Beginners can use resistance band, , Swiss ball or AB roller to help practice. [Quick and Easy Set-Up]You can set up your curl in seconds. Step 1: Slide the door anchor under the door and close the door. : Place your foot in and adjust the strap for a comfortable fit to begin the exercise. Adjustable curl strap holds 400 pounds, ensures a comfortable and secure fit for any body type. [Enhance Athletic Ability]No matter you are a fitness beginner or a professional trainers, through systematic training, using this adjustable hamstring exercise equipment can effectively target the muscles of your leg, knees, abdomen for strength training, so as to improve running, jumping, and weight-bearing capabilities, and reduce all kinds of pain caused by insufficient muscle strength. [Perfect Choice for Training]strap is strong, light, small and space-saving. It is convenient to use when you go out or workout. There is no need to go to the gym to use equipment for exercise, nor need other equipment for auxiliary use. At the same time, it is also the best gift for lovers or friends. color: Black Material: sponge + plastic Package Contents: 1 x sit-up aids Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.