"C",

If you are worried about being too hot then the expensive eVent parka is best... for about $250.

But I have a pretty breathable (and very light) Gore-Tex PacLite parka that sells for $89. for Regular length sizes and $99. for Tall sizes from Cabela's. It has large slash chest pockets W/ mesh lining in the pockets but no pit zips. These pockets can be left unzipped for more breathability.

If you are not worried about snagging it on branches try Frogg Toggs. Cheaper and nearly "disposable" - which is not exactly a green idea.

Eric
_________________________
"There are no comfortable backpacks. Some are just less uncomfortable than others."