Adjustable webbing strap for a secure fit The riser features an adjustable webbing strap to achieve a secure and comfortable fit. Simply adjust the length to match your setup, then place the device under a door or on a bed to begin your abdominal training in minutes. Durable, long lasting construction Built for long term use, the device uses a braided nylon strap that is washable and a foam support frame. It offers strong resilience, durability, and comfort, providing reliable performance over time. It is designed to resist wear and remain functional with repeated use. Quick setup for effective training This training accessory enables quick start to your crunch routine. Place the device under the door, close the door, then position your feet or legs to perform crunches. The setup is straightforward to help you get started fast. Portable and easy to transport When not in use, roll it up for compact storage and fit it in a backpack or suitcase. It takes up little space and is convenient to carry to dormitories, offices, hotels, or while traveling. Use scenarios Home workouts: set up in a living room or bedroom for regular abdominal training with minimal setup. Dorms or hotels while traveling: roll it up for travel and use it in small spaces such as dorm rooms or hotel rooms. Office breaks or temporary workouts: easy to pack and deploy for quick, convenient crunch sessions during breaks.