Rated 5 out of 5
I'm a big fan of
I'm a big fan of my Atom LT from Arc'teryx but I'd heard good things about the Proton, so gave the Proton FL a try. This one is definitely more breathable than the Atom - it's an awesome spring/shoulder season piece! I wore it on a hike at the end of February where it was in the plus temperatures but there was still snow on the ground, it kept me warm but I didn't overheat, plus blocked any wind nicely. I wear a medium or large in Arc'teryx generally, I bought the large and can layer. I will also add that the colour 'dark Illucinate' is more satured in real life than in the photo, I do like the colour more in person.