Help improve your core strength, flexibility, and balance, with FitBALL's complete line of professional-quality burst-resistant balls and premium ball accessories, books and videos. The FitBALL Wedge is used as a posture correcting seat cushion or a lumbar support. The inflatable FitBALL Wedge encourages proper alignment with its dynamic wedge shape. Feature a smooth surface on one side, with sensory points on the other. Dimensions: 15.25" L x 15" W x 3" H Weight: 3.9 lbs.