The Kolbs General Use Gel Cushion is a standard wheelchair seat cushion offering excellent pressure distribution for the price. Embedded in the core of the cushion is a gel leak-proof bladder. This specially designed gel bladder is encased in foam offering excellent comfort. Additional features include a non-slip base which ensures that the cushion stays firmly in place, a removable waterproof cover protects from moisture, and a fire retardant foam shell. Weight capacity 300lbs. 12 month limited warranty.