Revolution Balance Boards Wobble Cushion and Rocker Combo Add another dimension to your balance board with the wobble cushion and rocker from Revolution Great for fitness training, physical therapy, and also for using your board at a standing desk. NO PUMP NEEDED! Cushion is mouth inflatable and extremely easy to adjust height and difficulty. Rocker is made from high density foam - lightweight and super strong. Wobble Cushion and Rocker are both included.