TRX resistance band Easy to install and convenient to carry. Enable you to perform hundreds of training, such as exercise strength, flexibility, core stability and endurance. Suspension training uses your own body weight to create resistance. Allow you to adjust the degree of difficulty, which makes it suitable for people of different fitness levels and different training targets. A complete gym in a bag, gives you everything you need to build a better body. Door holder, can build strength, power and mobility from any door in your home. All you need is a door, a tree branch, or any number of easy anchor points. Developing core stability and power, anytime you want, anywhere you want. Material: Polyester.