DESC: The BOSU Balance Trainer can be used with the platform side either up or down for different types of balance challenge. The solid platform is 25 inches in diameter and the dome should be inflated until it is firm. Two recessed handles on the bottom of and towards the sides on the platform make it easy to turn over or carry. The BOSU Balance Trainer offers a different means to make exercise more appealing and effective for average people, fitness enthusiasts and highly trained athletes. Here are some of the many benifits of using the Bosu Trainer: -Develop and keep sensory feedback systems sharp & well trained. -Improved posture & functional movement experiences. -Enhanced coordination, balance & neuromuscular function. -Improved movement performance, & efficiency. -May help eliminate neuromuscular imbalances & improve every day function. -Create a new sense of body awareness, body positioning, postural alignment & movement confidence. Comes with a 90 day warranty. Professional package