Kifaru's Woobie is a staple in my backpack. I like the blanket design for summer, but it is perfect for spring/fall when it's between 45-65 degrees. It's also good additional insulation during colder camping. I can attest that it's four times better than a standard poncho liner. I have a mini compression bag and can really cinch the Woobie up to a size slightly larger than a softball.
ROCK6