Sufficient amount: the package involves 4 pieces door resistance bands, you can experience the same workout at home as you did in gym, exercising with your friends and families will create much more joyCause no harm: exercise bands door equipped with a thick foam bumper wheel creates no harm to the door or paint while in useDiverse training options: by using door fitness straps, your biceps, triceps, pectoralis, back or other parts of your body can be effectively trained, proving a variety of training options for people to opt for High stability: door attachment band is made of foam, ABS core and thick nylon webbing, these materials aim to offer high stability and tear resistance by precise sewingSimple installation: first you should place exercise bands door through the upper door seam, close the door and fix the , and then pass the exercise band through it, portable strap allows you to use at home, in hotel or other places