This jacket is based on our Garmin-Sharp Team issue Windstopper winter jacket but for some climates & some people that jacket is just too warm. So weve swapped out the fabric on the back substituting Warmer for Windstopper so you get a lot of breathability & effectively raise the temperature range of the the jacket by 5 degrees or so. Weve also used this in colder temps with an extra base layer & we think youll like how it lets a lot more moisture escape when you start high-intensity training for those really early season races. Functionally the result is like our perennial favourite Mortirolo jacket but with a sublimated graphic & pro team cut. Windstopper X-Fast 2 windproof fabric on front & sleeves Warmer fleece fabric on back for additional breathability Silicone gripper at waist keeps jacket from riding up Anatomic form-fit cut for cycling position Full length YKK Vision zipper Flip-up Thermoflex collar for maximum protection Side panels in Thermoflex for extra breathability 3 external rear pockets Rear reflective tabs keep you visible in low-light conditions