I struggled over getting this - just seemed like I could wear a vest with a shirt and achieve the same results. But for some reason this is cozier and warmer than a vest with a shirt. It keeps my chest warmer and out of the wind while my arms can breathe, and the chest part seems to breathe well too. I absolutely love this piece, it's my new favorite midlayer replacing a heavier full zip soft shell. IT is super comfy and light and not nearly as bulky as my previous midlayer. On a cold day I add a wool T-neck underneath it but on most days a lightweight crewneck is fine. Love the hood, it's plenty big yet doesn't impede vision. A couple issues are that when you go up a size in OR, you gain length, longer sleeves and a bigger chest, you just never gain width. I really should wear a large, but it was too short for wearing with a pack and a little snug around the hips. So I went to an XL and it didn't really get that much wider, mostly just longer (which I liked) and bigger in the chest (which I don't need.) It seems like the large and XL OR models are skinny with big breasts! Please just make the Larges a little longer and wider so it works for a greater variety of female shapes. The only other suggestion would be to add a slot for headphone cords to go through in the chest pocket and zippers on the lower pockets would be nice, although I don't use those pockets that much. Everyone needs a deviator hoody!
Colorado year round skier