http://www.thedesignblog.org/entry/sleeping-coat-is-both-a-windbreaker-and-a-sleeping-bag/

This is a link to a sleeping-bag jacket. Sure, it looks goofy. But can we put a price on comfort? Plus, you can use the jacket in various different ways: jacket, trenchcoat, sleeping bag, mat + jacket. It's multifunctional, and that's why it's awesome.

Also, click around and look at the rest of the site. It's not the best design blog, but it's got some cool stuff.