Hey dagny. They are great. I bought a used Swiss military tapered model from Cheaper Than Dirt back when they were 5.99. Makes a great liner for winter bags (no cold nylon contact) and adds warmth and that comfy feel. I have slept out in it on a few chilly desert nights. It sounds like she need something that will fit in her travel bag. I think it would be her best option. Just Ol' Snakes opinion.