The BOSU® Exercise ball was designed by personal trainers to be the most versatile and durable exercise ball on the market. This starts with where the BOSU® Exercise Ball is made, right here in the USA. Designed with burst-resistant material that’s able to withstand 1,000 pounds of pressure. Added texture ensures you won’t lose your grip even during the most intense workouts. Trust your exercise equipment with BOSU®, a brand that’s been innovating in the fitness industry for over 20 years. Available in two sizes (55cm and 65cm) and two colors (Blue, Grey).