Use either the curved or flat side of this multifunctional core training device to integrate balance into every aspect of fitness, sports performance, or rehabilitation, The BOSU Balance Trainer adds versatility and challenge to an incredible range of activities: cardio, strength training, athletic and sport conditioning, core training, and mind/body workouts, Combine it with other equipment to add new, exciting elements to existing training regimens, Small Storage Rack for BOSU stores up to 6 BOSU Pro Balance Trainers, SKU: PWSS1164