Research in the wind tunnel has proven the Speed Tech fabric to be the fastest out of more than 180 fabrics. It is now featured on the Women's Aero Tri Jersey's shoulders and back for minimum air drag on wind-sensitive areas. Since nutrition is as important as the swim, bike and run during a triathlon, new angled back pockets offer plenty of storage for bars and gels while preventing any loss during the race thanks to a tight elastic opening.Fill the ice pockets located near the common iliac artery with ice from the feed zone to help blood vessels stay cool.