if you’re worried about staining your sheets or clothes while you’re sleeping, consider getting fleece sheets and wearing fleece pants! fleece is made of polyester, and it’s REALLY hard to get it to stain. like, really hard.
you can actually use fleece as guinea pig bedding like i do, and I can personally attest to the fact that it’s strong as hell. I’ve had my piggies pee on it, poop on it, I’ve washed it once a week in hot water on a heavy cycle with bleach and vinegar, and that stuff has yet to get even a little discolored – and I’ve been using it for a year.
additionally, fleece is a relatively waterproof material, which will help protect your mattress.
so yeah, if you have an issue with staining your bedsheets or pants, invest in some fleece sheets and pajamas. they’ll save your life.