The CanDo Balance Stone is the inflatable solution for improving balance, strengthening the lower back, aiding posture and reducing back pain, stress, restlessness and anxiety. Shaped like an exercise ball sliced in half, the Balance Stone is dual sided. The bottom side is flat and smooth. The upper side is textured with nubs for tactile feedback and stimulation. Standing, sitting or lying on the stone requires active participation and constant adjustments from the user to find balance. Not just for sitting and balance training, enhance everyday workouts by incorporating the stone into strengthening and toning exercise routines. Nearly every exercise routine can have a new twist and enhanced difficulty. Ideal for sciatica and improving range-of-motion. Laying on your back also provides a terrific massage as the nubs press in and relieve stress and pressure points. The stone arrives partially inflated so users can right on it as soon as it's out of the box. This is a case of 6 CanDo Balance Stones in Blue with a 14" diameter. Please note, Balance Stones do not include an air pump. In addition to air, the Balance Stone can be filled with either water or sand for added stability. Makes an excellent vestibular trainer when used with the curved side down. Combining dynamic seating and static positioning, the degree of difficulty in trying to sit on the stone can be varied by inflating or deflating. The Balance Stone is Latex-free, so it's safe for everyone. Easy to clean needing only a damp cloth and mild soap.