If you happen to be looking for a single piece of equipment, with which you can perform a limitless array of exercises with, the Infinity Loop is what you're looking for. The Infinity Loop is great is for training anywhere, at any time, with no other equipment required.
A one-size-fits-all solution to train your glutes and legs, the Infinity Loop features fabric-coated comfortable elastic loops that won't grab on your skin. Also includes (3) loops attached at the center point to allow for a truly wide variety of options, with the resistance level becoming more challenging as you add loops.
Comes in Standard and Pro Version. The Pro Version is designed for even more intense resistance levels.