The Cobalt Blue Move N Sit Cushion is designed to help children to maintain a comfortable and secure posture. It is especially useful as an aid for those who are prone to slumping when seated. The cushion is wedge shaped and inflates to the desired firmness using the mouth or a manual pump. A smaller size is also available. One Move N Sit Cushion Colour: COBALT BLUE Good for users with limited muscle tone in their trunk Deflates easily for storage