I went to the Marmot Precip after my TNF Mountain Light started leaking. I got about 7 or 8 years out of the Mt. Light so I figured I got my moneys worth out of it. After about five years my Precip jacket started flaking off near the neck area. The Mountain Light did not breath any better than the Precip. I found an Arc Teryx Theta AR on sale and now use it but do not have enough use with it yet the know how it will work for me. I like the Precip and may get another one but wished there was something out there that really did breathe. This is an interesting thread. Thanks all.