This is an exercise kit consisting of five different resistance bands (10, 15, 20, 25, 30 pounds) and 2 pull handles, 2 ankle straps, and a door anchor strap, all in a storage bag, making it very handy whether you are home or away. The resistance bands can be stacked, giving you any combination of resistance from 10 to 100 pounds. The bands are made of 100% natural latex, making them resistant to drying out, deforming or breaking. A really great set. Will be well-used.