Has anyone had any experience with waterproof sprays? Recentley watched a friend spray his boots with one of these sprays and then pour water on them and was quiet impressed with the results. Not sure what the brand of spray was, but it was in a blue can and bought from Anaconda? Has anyone used them? Intrested in how long it lasts? Any recommended brands? Any reason why you couldn't spray pack, sleeping bag or pretty much anthing else?
Cheers