I have used Nikwax wash in stuff on my snowboard jacket and soft shell (soft shell formula) and it did restore water resistance and water did bead up and roll off afterwards. I have also used Tectron DWR which I think is similar to what came on my North Face snowboard jacket originally. The Tectron spray on stuff lasted longer on my rain jacket, but as I later found out, it is a possible carcinogen. The solvent smell during application isn't great nor is the residual smell that lasts for a week. I have not tried Tectron on my snow jacket.