This inflatable back cushion gently stretches and relaxes the muscles in your back for superior comfort and support - an easy way to increase flexibility, improve posture and restore the natural curvature of your lower back. The integral fingertip pump lets you adjust the pressure to customize your comfort level from soft to firm. Soft polyester blend outer cover; wood/urethane foam/PVC/rubber construction. Lightweight and portable. Wipes clean. Uninflated, 14 1/2''L x 9 3/4''W x 2 1/4''H.