Rating: 3 / 5
I've tested my jacket several times during a prolonged rain and, in all tests, I eventually got wet. I'm sure the wetness was not from the inside as I never engaged in anything more than mild exercise while getting wet in this jacket. I stated my concern, by email, to the staff at Integral Designs. I received a quick response expressing surprise at my concerns, suggesting that I check the seams for leaks, and offered that they might have to inspect the jacket. I wrote back, saying that I couldn't detect any seam leaks. I have not heard from them since.
The jacket is a light-weight, no frills jacket that works well as a wind-breaker, and for protection during a light rain or quick shower. On my last trip I wore it beneath my Bozeman Mtn. Works Spinponcho "T" LITE while hiking in cool weather beneath occasional spats of everything from light drizzle to an occasional downpour. Later, in camp, the jacket was fine as my only protection during periods of light rain. I'll keep the jacket - and my poncho.