The Mini Hydro Ball Double Bundle gives you two balls in one purchase — so you can progress your training, share the work with a partner, or keep one in your bag and one at home. Each ball is built specifically for athletes who rely on arm speed, control, and precision — whether you’re on the mound, under center, in the pool, or on the court.

Inside each ball is a unique combination of water and compressed air, creating unpredictable, constantly shifting resistance. That instability forces your body to stabilize through every movement — developing the exact muscles and control needed for high-level throwing performance. With two balls in your bundle, you get the flexibility to warm up with one size and load up with the other, or run partner drills that keep both athletes working at the same time.