Travasaks on sale at CW.

Travasak was out of business when I was buying, so I went with SuperBag, despite the added cost. Convenience was the biggest factor. Regular sheets would make it difficult to make the bed given the tight quarters, and sleeping bags are harder to wash than the removable sheets of the Travasak or SuperBag. Convenience is a big factor if you're making up the bed for each use.