I just bought these GiZilla Grappling Grips online about a month ago. I know you can use a towel for a lot of the workouts, but my wife gets ticked off when I take her towels and ropes are terrible. These grips are really strong, made out of Heavy Gi Material and Seatbelt like material and I like that they work with all of the machines at the gym. If you are tired of rope burn, hearing it from the wife and still want to incorporate grip strength training into your workout, I would check out these GiZilla Grips.