Ultralight, inflatable pillow for extra comfort on your trips and in your hammock. Just like all COCOON Air-Core Pillows the Hammock/Travel Pillow features an inflatable, exchangable air core underneath a layer of premium synthetic fill. The zipper in the soft polyester microfiber shell makes it possible to take the air core out for washing or repair. A low-profile check valve provides effortless inflation and deflation. The perfect hammock and/or travel pillow with minimum packing size!