Stows down to less than the size of a Nalgene by rolling it into its own hood and weighs next to nothing. Non-restrictive fit with good sleeve length and very good ventilation - have worn it backpacking, canoeing, portaging, and just general hiking in perfect comfort. At 5'8" and 150lbs (athletic build with wide shoulders) I probably could have got away with a medium instead of a large, but I can actually fit a lightweight down jacket underneath when conditions get rough. Excellent hood adjustments; full protection without getting in the way. You'll honestly forget you're wearing it, except you won't be getting drenched!