Seat gel-coated fiberglass shell. Large shoulder harness slots to accomodate various heights. High side bolsters for lateral leg support for higher protection. Removable back, base and leg cushion for maximum individual seating comfort. Upholstered entirely in new high breathability AIRTEX® material. Upholstered customized on demand.HANS® and HSC PATENT compatible. XL VERSION LARGER AND HIGHER.