Hi everyone, I need some advice on the type of fabric to use to cover 2 large memory foam seat pads for a camper van. We will be sleeping on these cushions as well as sitting, hence the memory foam, for greater comfort. The fabric needs to be hard-wearing, totally non-stretch (old machine), and preferably machine washable. I just don’t know what to search for, or what weight I need. I’m an inexperienced sewer, so don’t know if some fabrics are harder to work with and/or fit onto the pads, and best avoided. Any thoughts?