From the website:
“Billie Jean” wristbands
This is about the easiest and quickest thing you can knit. Everyone from tennis players to breakdancers to rock stars are wearing them, and they’re a great project for reducing your yarn stash. A cross between an arm-warmer and a bracelet, these are good for wiping your brow, cushioning your wrists while typing, stopping drafts from creeping up your sleeves, and of course, simply accessorizing. Wear them alone, in pairs, or several all the way up to your elbow.