You’ll also want to check the material of the cover. If you’re going to take your folding mattress on camping trips, you’ll want a cover made of sturdy material that can withstand the elements. Some folding mattresses have waterproof covers, which is also excellent for camping or kids. If you’re going to be sleeping right on top of the folding mattress, make sure the cover is made of a soft, comfortable material. If the cover is not soft enough to sleep directly on, you will want to make sure the mattress is a standard size so you can easily purchase sheets to fit it.