Had this jacket for about a month now and all I can say is it's awesome! Perfect for rain and a pretty damn good wind breaker as well. I can't say it's completely waterproof because I haven't been in a monsoon rainstorm but it's kept me dry for every other rain storm. Also it packs up so if you don't need it right now but maybe later for like a camping trip or something you can pull it out and put it on.

Instructions: the left pocket has a label inside that says "packable" turn that guy inside out and stuff the rest of the jacket on in there.

About the size of a normal picture 6"x4" and the width of maybe 3-4" probably depends on how well you stuff it in there. Hope this helps!