The concept of this product is great. The manufacturing of this product is very poor. The straps that are used to tighten the weights around the forearm easily break. After first use, not even 10 minutes into the workout and a strap broke off and I had no way of tightening the first part of the arm weight. If the straps were made better and sewn better to the product it would be a great product but I am very disappointed in the manufacturing of straps to the weights.