Cushion gradually slopes down toward the front of the seat to maintain a natural S-curve in the spine, helping students sit upright and stop slouching. The soft cushion curves slightly to contour to the student, and a cutaway reduces pressure on the tail bone. Made of comfortable Therasoft cushioning, the cushion is non-abrasive, anti-static, and washable. Cushions support up to 250 lb. Each is 10”L x 15-1/2”W x 3”H; 1 lb.