Review on Speed Jump Rope With 4 Metal Ball Bearings For CrossFit, Boxing, And Workout - Boost RPMs And Perfect Double Unders - Comes With Naturalico Carry Case by Doug Powell

My husband and I both purchased this because my mom has been telling us how poor our posture was. From what I can tell after using this for a few weeks, it works well and doesn't allow me to slouch when having it on. After wearing if for 30-60 minutes a day, my back with sore like I had just worked out the night before. There is a note that this will happen and it is recommended that you increase the wearing time gradually. My only complaint is that the material sits along my neck and my arm pits and it's rough and scratchy. It is the same material as the adjustment part of a typical backpack strap. Other than that, my husband and I are both happy with the product and would recommend it.