A useful addition to our seat cushion line. This disc is a round, slightly textured cushion with a larger 15" diameter and slightly beveled edges for added sitting comfort. Comes inflated to approximately a 2" thickness. Using our Pocket Pump®, or any pin valve pump, air can easily be added or removed. Great as a marker and floor sitting aid during ""circle time"" or any floor activity. Also used to improve balance in kneeling and standing. *Sorry does not qualify for free shipping promotions.