The sizing information on this page is wrong.  Based on the chest size recommendations I got a medium and can barely squeeze my shoulders into it.  The description says "detachable" hood.  It should say "one time only detachable."  After unattaching it, I couldn't find any way to get it back on.  The bottom of the zipper for the hood is buried deep in a seam, and I couldn't come close to getting a good enough grip to reattach it after struggling with it for 10 minutes.  The collar is uncomfortable.  It seems designed to stand up and press against your neck and head rather than lay flat like a normal collar.  Returned for refund.