Optimal height and width reduces drag caused by stem and headset spacers with no increase in frontal area; 5:1 ratio aerodynamic airfoil design; Non-porous, extra smooth exterior reduces drag; Two large, easy-to-grab Super-Slide zippers open and close from either direction; Contents are highly visible against the silver colored interior; Durable, non-seizing steel screws for easy installation; Non-slip, rubberized hull stabilizes storage; Structured inserts retain aero shape