I'm 5'8" and 150. Ordered a M and it fits perfectly. I was a little wary of the tapered arms (ie alpine fit) but now that I'm used to the fit it's excellent. The jacket is very warm for its weight and I've warn it in temps from 20-60 and was comfortable. The liner feels luxurious. I could do without the chest pocket but it does not detract from my overall opinion. I highly recommended this jacket
I have owned a half dozen hiking boots and these are by far the best. Purchased them last winter. Overall comfort is amazing. I get excited when I have an opportunity to wear these boots. Very warm for a hiking boot and GTX lining will keep you bone dry. You can wear these in any season.