So, I just purchased some U-haul blankets today & have them in the washer as of now, but I noticed in the store that they were really thin! I didn't expect that, but bought a couple anyway because I've heard a lot of good things about them on here. My concern now is about how to use them. Origionally, I assumed I'd just need one layer, but am I going to have to double layer? Please share your tips! Thanks!