When you get to the age where a couple midnight pee calls are needed, those bag liners can be a real pain to get out of. That's one reason I love my quilt. It's warm, comfortable, and easy to get out of if needed. Taking a set of long underwear solely for sleeping will keep the bag clean and egress easy.
Instead of taking slippers for late night excursions in windy, snowy, cold-ass environments...take a pee bottle.
