Profile: Exertools Inc. develops and supplies products to the fitness, therapeutic and rehabilitation markets. We deliver gym balls of varying diameter according to a person's height. Each gymball comes with a light duty accordion-style air pump and inflating instructions. Our AquaJogger® buoyancy belt comfortably suspends the body at shoulder level in deep water. Our Hard Shell Exballs are 38% rubber balls, and receive their weight from the mass of the shell & the shell alone. Each ball comes with an integrated air valve allowing for increased or decrease inner air pressure, which determines the ball's bounceability. These exballs can be used with a medicine ball rebounder, such as the PlyoBack Elite, against a brick or cement wall, in a gym, strength room or outside. Known for the durability, these balls have been the choice of many conditioning professional for the past decade.