By using ultralight materials to construct a down cushion-top over a TPU air bladder, our Aeros™ Down Pillow is the lightest fully-featured down pillow on the market. Light, warm and comfortable, the premium down cushion-top is made from the same exceptionally light and transparent 10D fabric used in our Spark™ sleeping bags. Differentially cut horizontal baffles reduce down migration and prevent the down compressing, even when the air bladder is fully inflated. The cushion-top wraps over the front of the pillow for neck comfort. The rest of the pillow case is made from lightweight 20D fabric. Our Aeros™ bladders use a unique long-lasting anti-hydrolysis TPU film which prevents material breakdown from moisture exposure. Extremely light, the bladder’s horizontal baffles create a 3D surface that cradles the head for additional support. The multi-function mini-valve provides easy inflation, deflation and fine tuning.