Squirrel Nut Zippers is a big band/jazz/alternative rock band that rejoices at the difficulty people have pigeonholing their unmistakable sound. A perpetually evolving, hybrid-stew of Southern roots traditions, blues and jazz, the Zippers were aptly tagged "'30s punk" by one critic, though NPR's Morning Edition might have said it best: "It's not easy to categorize the music of the Squirrel Nut Zippers, except that it's hot."