Patagonia Houdini is a piece I won’t ever leave behind. It’s a recent 4 oz pullover that does an okay job of repelling precipitation and turns my Montbell down vest into a very warm, protecting system that is very light and compact to carry. Many times in cold temps I’ll wear the Houdini for the first half hour during the warmup. Then it goes back in the pack for backup, a 10 essentials thing.