I bought it in 2010 so I'm guessing its not eVent.... I think there was a fire hazard issue with eVent ? but regardless the fabric.... if you set your tent on fire while winter camping .. well that pretty much labels you. I'm a fan of eVent, but as for the alternative, I took the tenshi out to mt. Hood in the snow and to the oregon coast in the rain....... no condensation issues either way. I will say, if you're taller than 6 feet you might be pushing fabric in this tent.