Mile High Mountaineering Stacker Pillow
Source: bought it new
Price Paid: $18
Dual-use storage compartments which serve as an effective pillow because of microfiber on one side. Perfect for compartmentalizing clothes when packing, while alleviating the need to pack a pillow.
Basically, these stacker pillows are glorified zippered storage compartments with microfiber on one side, but they are extremely convenient and, as simple as they sound, very helpful and very effective.
If you have ever used a stuff/compression sack as a pillow, you've probably experienced either your head constantly sliding off the pillow or the pillow continually moving. These stacker pillows put an end to that — simply pack them with clothes, zip it closed, and voila.