PREMIUM MATERIAL: The Center bar of hamstring Curl Strap is made of steel, Provides maximum stability and control. Thicker with curved non-slip cushioned high-density foam pads provide comfortable ankle or foot support. Unique triangle design makes the training bench Stable still whenever you are training. ERGONOMIC DESIGN: High-density soft foam covering the handle is comfortable and non-slip while avoiding ankle injury. Sit up equipment with double-row support bars strengthen heel force, exercise more efficiently and balancedly, and help you become a perfect body. Hamstring curl strap is the perfect waist and abdominal workout equipment. ADJUSTABLE STRAPS: Adjustable hamstring curl strap adjusts to your shoe size. Just adjust the strap when use, place this device under the door, close the door and insert your foot or leg so you can quickly enjoy your sit-up training. COMFORTABLE AND DURABLE: Hamstring Curl Strap allows a lot of strength training focused on the arms, legs, chest and abs such as abdominal curl, biceps curls,shoulder press,one-armed boating and so on. High density foam padding makes fitness more comfortable. An ideal training equipment for both gym and home use. USE ANYTIME, ANYWHERE: Do not Miss a Workout Because You Are ON THE GO or You Cant Get to The Gym - Compact Design Allows You to Bring This Product With You ANYWHERE Without Taking up Much Space. You can exercise multiple types of smooth and clean floors in offices, bedrooms, living rooms, parks, etc. Product information: Color: Black Material: high-density sponge and plastic material Size: about 28 x 30 cm, unfolded size 28 x 45 cm Package includes: 1pcxSit up aid