Probably one of the best all round garments Ive ever owned in my 40 years of riding. Pockets perfectly designedBIG. They are pleated on bottom so jersey doesnt pull off back at hem allowing cold snow melt under your jacket. Also, they dont go all the way to the hem, so the hem stays put. If crud does manage to creep in, the grabber is sewn on both top and bottom so it doesnt accumulate road crud under the grabber.
Chest vents only work in combination with opening main front zip. The air then flows through surprisingly well. Ive opened front vents alone at -12C, and they dont really do much w/o front zip open.
Material seems to be the same as Polare tight, but stitching is better. Zips are plenty beefy, and workable w/lobster mitt.
Temp range is 50 to, so far, 15F w/ a lot of small-ring-downhill wind. At 50, you need to have all zips open & its still a chore, but doable if say youre doing a crack-o-dawn & it warms up. At 40, start with a light base, at 15 wear a real, true, task-specific, mid-weight layer e.g. Icebreaker 260 (320 is really a lot). Cut issurprisinglynot Italian, its more of a semi-fitted (2xl, 6-3, 225lbs) so you can layer it. Given this success, dont know why you would go for the less breathable e.g. Due, Stelvio, or 1-2-3.
BTW at 15, I was good for three hours in: Gore thermo booties over Castelli belgian booties over Walmart over-calf wool hunting socks & wool socks under shoes. Use Amfib tight, w/Thermo-Robioux knee warmers underneath (Capo LE). Giro 100 proof gloves, and Gore WS balaclava. Get insulated water bottle or your water will freeze. Yeah, dressed as above, I was sweating a lot underneath, and got a nasty dehydration headache because no water.