No Rain Light Top will get you through light rain, think of it as half way between a rain cape and wind vest.
The full no rain jacket will keep you dry and warm in heavy rain, eventually it will soak in but we’re talking after 2 - 3 hours of heavy rain. I used this most of the winter down to -10c and was fine with just a short sleave jersey on.
The no rain arm warmers, bibs etc are just like Castelli Nanoflex