Shock Absorbing System (SAS). Ergonomic contouring comforts and supports the spine. Side bolsters provide lateral support to help keep rider seated. Patented pinch proof hinge molded into the shell. Lock Down detent secures seat in the down position at speeds up to 70 mph. By compressing the suspension system, the rider sits in the seat not on the seat. Molded foam specifically fits the ergonomic contours of the seat core. The waterfall front allows proper circulation at pressure points behind the knees. The spring grid flexes with the coil springs and supports the seat foam. Continually adjusts for comfort. The quad spring suspension provides comfort and 3" travel for shock absorption. The seat fits in confined cockpits and rotates on a 23" diameter measured from the seat post.