I bought this for back packing because it is light weight and packs small. Used under a rain jacket it should provide good warmth and it can be used by itself for milder temperatures. I think it is well made. It is a regular fit ... so it would still fit me if I were 15 lbs heavier. I got Large, I am 5' 10' and 175 lbs. It will compress to fit for layering.
This review was written in the old system and had content requirements that are different than reviews written today.