The X-Over Arm and Shoulder Resistance Bands 4-Pack offers professional-grade training with advanced Safety Sleeve Technology to prevent injury from broken bands and protect against latex allergies by eliminating direct contact with rubber. Proudly made in the USA, these bands feature durable pro-grade carabiners and plastic handles, with laboratory testing confirming durability beyond 150,000 repetitions—far exceeding competitor standards. Designed to strengthen shoulder muscles essential for throwing motions in sports such as baseball, softball, tennis, volleyball, swimming, and golf, they support internal and external rotator cuff exercises that enhance shoulder stability and prevent injury. The versatile bands can be used individually or crossed over to increase resistance and accommodate a wide range of exercises, making them ideal for fitness routines, physical therapy, and rehabilitation programs. This 4-pack delivers premium quality at an exceptional value.