The Chillax pillow is great for backpacking. It compresses to an insignificant size and weight for transport and quickly inflates for a comfortable pillow while sleeping. I wrap it in a t-shirt while I sleep to make it feel more like a normal pillow.

Available on Amazon.comChillax UltraLight Camping Pillow – Compressible, Compact, Inflatable, Comfortable, Ergonomic Pillow for Neck & Lumbar Support and a Good Night Sleep while Camp, Backpacking