I wash mine (Schneider's), but only as much as it really needs it. This year that was once during the rainy season and once at the end of it. You don't need to re-waterproof it each time. I did go ahead and re-waterproof with Nikwax this last washing, even though it still seemed to be doing fine; this was my second season using it, and I figure once every two years is a reasonable scheduleok, thanks for the different clarifications. I tend to have bad luck on buying blankets, maybe I'll try the local tack store so I can at least feel them and see. Also, can the waterproof turnout sheets be washed? Or if they are does a coat of waterproof spray or something need to be put back on them?