Giordana Men's 2015 EXO System Cycling Short Sleeve Jersey,White/Black, Large A.i. One is used on the front panels that wrap around to the center back panel of the jersey. Asteria 2.0 is used on the shoulders, sleeves, and center back panel for optimal aerodynamics. Host Carbon is used for the rear panels and limits stretch of the jersey when the pockets are loaded. Kite Mesh aids in the lightness and breathability of the jersey around the pocket and under the arms. LoPro 30 used for the armbands and waistband. The no-profile collar takes cues from aerodynamic skin suits to decrease drag.Full CamLock reversed zipper and three rear pockets with flap for an aerodynamic profile.