Sea to Summit designed its Aeros Premium Pillow to keep your head secure and comfortable while you sleep on backpacking trips. This inflatable pillow features a brushed polyester shell that's both durable and super soft against your skin. Sea to Summit added some synthetic fill between the case and TPU bladder in order to maximize your comfort and wick moisture. The curved internal baffles make sure you wake up with your head on top of the pillow instead of some twig on the ground, and a scalloped bottom edge lets you sleep comfortably on your side as well as your back.