Perfect for gram counting backpackers, the Aeros Ultralight Pillow has a soft 20D stretch polyester exterior and a silent, contoured TPU air bladder for support and comfort. Inflation, adjustment, and deflation take seconds, thanks to our patent-pending multi-function mini valve. Plus, secure your pillow to your sleeping mat using our unique Pillow Lock system. Features Inflate pillow in just a couple of breaths and fine-tune it easily with the multi-functional valve. Stretch-knit 20D polyester knit is very soft and comfortable. Curved internal baffles create contours that cradle your head. Scalloped bottom edge centers pillow around your shoulders whether you are sleeping on your back, side or upright in a chair. RF welded for strength and durability. Face fabric laminated to a silent, high strength TPU air bladder.