The BTS Balance, Tone, Strength Dome is a multi-functional exercise device that is ideal for balance training and for developing core strength by providing an unstable base to work out on. By engaging multiple muscle groups, the versatile dome makes a wide range of activities more challenging. This provides a full-body workout while integrating balance and flexibility into every aspect of your fitness, sports performance, or rehabilitation. Its heavy-duty base with a non-slip surface provides stability. Inflates to 21 cm high.