The BA air core pillow is a dud. Granted the construction is top notch, but the size and outer material make for a bad pillow. I have a green $5 REI pillow that works much better although it is heavier. The air core pillow footprint is too large to fit into your sleeping bag hood. The thickness of the pillow is a bit lacking, so it would be better to under inflate and fold it in half inside a stuff sack. The slick fabric simply slides out from under my sleeping bag when it is resting on my big agnes sleeping pad. It actually makes a much better seat than a pillow!