X-Over Bands are designed specifically for Shoulder and Arm Care. The unique cross over style of resistance is designed for working the smaller muscles to increase stability of your Rotator Cuff and the smaller muscles that create stability around your shoulders, scapula and arms. The support that this particular type of band and exercises provide allow you to function better with any and all activities you do that include your upper body. No matter if you are in to Extreme fitness such as Box Gyms, Weight Lifting, or body building, or you simply want to define your shoulders in your body building efforts, these bands will expedite the results. If you are experiencing shoulder injury during activities, these bands are your solution as well. By building the smaller supportive muscles, you can push your shoulders hard, lift more weight, do more pulls ups, or whatever your EXTREME exercise is. This set of bands will help you push harder and go further with less risk of shoulder injury and define your upper body at the same time!