These have been the only bands I've ever bought. With that in mind, they meet my expectations but wish they'ed last a little longer. My most used band developed nicks after about 18 months. After tempting fate I decided to heed the manufacturers warning and get a new one. They come in any weight range you can imagine. I initially bought a pack of 5 or 6 but since replaced and bought individuals. I don't have the space for weights and I understand they'll never be the same but I love the portability and flexibility to do just about any weight lifting exercise.