1. Adjustable strap length: The hamstring curl bands only take a minute to set up for abdominal training. The adjustable strap ensures a better fit and comfort. Simply adjust the strap to the right length and place the device under a door or on a bed—quick and easy. 2. Strong load capacity: The hamstring curl band features encrypted nylon braiding for superior strength and durability. It's washable, equipped with a foam support frame for comfort, and resistant to breakage. Designed for longterm storage and use, it ensures a comfortable leg workout. 3. Start training quickly: With this accessory, you can begin crunches instantly for better results and comfort. Just place it under a door, close the door, and secure your feet or legs—ready to go. 4. Easy to carry and store: When not in use under a door, simply roll it up and pack it in your backpack or suitcase. Compact and portable, it's ideal for dorm rooms, offices, hotels, or travel—keeping your fitness routine on track anywhere.