hi-competitive shape and design carbon, kevlar, and fiberglass constrctions available wing rigger and tube rigger options Racing shells: 4X, 4-, 4X/- ( ... wing rigger, foot stretcher board, seats.KEVLAR RACER (A)Shell: Hi Modulus Carbon/Kevlar wet layup, with Nomex honeycomb ... riggers, Carbon foot stretcher board, seats.EXPLORER (B)Shell: Hybrid (Carbon and Kevlar) wet layup, with Lantor ® core mat. ...