I have a child's sleeping bag, not rated for any sort of cold-weather use, best for warm seasons where temps drop at night. Fits a child, or an adult under 5' tall.

Free. Would love to see a hiker's family get it. My family will be buying new sleeping bags as camping time comes closer. PM me. Don't ask the brand, please, I have no idea. It's blue on one side, gray on the other, not a mummy bag. It may work as an extra layer to throw on top of you on colder nights.