The versatility of the BOSU® Pro Balance Trainer is endless—it can be used for toning and strengthening muscles, improving balance and agility, improving flexibility, functional training, bodyweight training, conditioning, and more. It’s made in the USA from a patented non-slip, dually over-molded base material that is meant to withstand normal usage on a consistent, daily basis while keeping the same structural integrity. The burst-resistant material is both latex and phthalate free with a smooth, non-skid, non-marking base. The base is reinforced with a dual over-mold for added strength.