I was actually thinking about carrying a fleece blanket for a summer trip I'm doing. I have a synthetic sleeping bag liner that's very small and light, and it's actually good on its own for a lot of the warmer stuff I do around here. But I'm going up towards Canada in June and I'm not sure that's going to be enough. I don't want to take my winter bag (mainly because of bulk, not weight) but want a little extra insurance. Seems like a good way to go. Cheap, light, and won't take up much space.