It’s only just launched, so probably not, but there’s an interesting article on road.cc with a bunch of info on the development. Sounds like they put water-resistance to one side and focussed on maximising breathability combined with wind protection using a fleece-backed, knitted rather than woven fabric:
“It uses a knitted face and a fleece back, so it is a slightly heavier weight, winter-rated piece that allows four times as much air to come through than was possible with Gore Windstopper. That is a considerable amount, but the rider still has no perception of wind coming through the jacket whatsoever, even on a high-speed descent.”
I wonder how suitable it’ll be for a classic British on-off showery sort of day.
https://road.cc/content/feature/castelli-ristretto-cycle-clothing-tech-new-era-sweat-free-cycle-wear-311583