So light and packable, there's no need to ever leave it home. Just stuff it into its own pocket and you've got a travel neck pillow. 700 fill StormDown™ powered by DownTek™ is highly resistant to moisture so it insulates even in wet weather. Polyester shell has our StormRepel® durable water-repellent (DWR) finish. Water beads on the surface so it doesn't soak into the fabric.