The Crossover Symmetry Crossover Cords 2.0 Resistance Bands in Red are designed for gym and training purposes, suitable for both home and commercial use. These resistance bands are made with durable materials including nylon sheath, foam, metal, and rubber, providing a comfortable and secure grip for workouts targeting the chest, shoulders, arms, and back muscle groups. The 25lb pairs of medium resistance bands offer a versatile option for individuals looking to enhance their fitness routine with improved strength and flexibility.