Research in the wind tunnel has proven the Speed Tech Striped fabric to be the fastest out of over 180 fabrics tested. It is now featured on the Aero Suit's shoulders and back for minimum air drag on wind-sensitive areas. The suit's side panels accomodate the cyclist's aero position, removing wrinkles in the process, as does the shorter front zipper. The new 5.1 Motion chamois offers more padding in the front aera and on sit bones to provide comfort where it really matters. The chamois' sides are less bulky to avoid rashes after hours of pedaling.