The Keester is a cushion specifically invented, designed, and engineered for the comfort of child. The Keester is a practical solution for the discomfort and lack of back support experienced by children on most automobile booster seats. The Keester is more than 2 inches of polyurethane foam for added comfort. The rear of The Keester is a semi-circular cut out that suspends the tail bone and reduces pressure on child's sensitive nerves, preventing numbness.