Used for the moment without the plastic bag supplied by + but impermeability is good in a storm. Larger than I expected (great smartphone + + checkbook pen + paper + wallet without problems) but probably not for thicker objects like app.photo or very thin). Contrary to some opinions, I do not find it very restricting and closing system anyway, even with a "normal" bag, the time to find the phone ringing in the background, usually we missed the call !!! Some want their cake and eat it too. They invent a waterproof bag with pop phone system when it rings, and I would buy. Meanwhile not find better !!