Two-thirds of aerodynamic resistance is created by the rider, so even the smallest gains here can make a big difference. In wind tunnel testing, the Aero Race saved 10 watts when riding on the hoods at 40km/h
(25mph). That translates into 40 seconds saved every hour compared to a standard jersey. So either you can ride faster or with less effort - your call.
Castelli Wilier Free Aero Race Shirt Zero 7 FABRICS : Velocity with Prosacco/mesh SIZE : S / M / L / XL / XXL / XXXL COLOR : ART. W L 5 8 ner o / black ART. W L 5 8 _ 2 b ianco-ner o / white-black > open mesh back for breathability > 35cm front camlock ykk zipper > silicone gripper elastic at waist > giro+ arm elastic for flat > aero fit Let op! shirt valt zeer klein uit.