The ShadeSock is an alternative to beach umbrellas or sail shades. Intended for beaches that get a steady breeze, it's essentially a giant windsock. Unlike an umbrella, it works with the wind (and indeed, requires it in order to stay aloft) rather than fighting it. And unlike a sail shade, it's completely silent.Of course, you'll look like a fool if you bring this to a beach that doesn't have stea