THE FUSION OF TWO. Fusione is the ultimate lightweight shell that's breathable and can keep the wind and rain out. It's extremely packable, thanks to the light Windstopper Helium fabric. The zippered vents in front and back provide maximum temperature regulation with the easy to grab rear rip cords. Fusione also features a flip up Thermoflex fleece lined collar, a silicone gripper on the waistband to limit ride up, and reflective piping on front and rear. reflective piping around shoulders, front and rear for 360 degree visibility.