1、Button inflation: inflate by repeatedly pressing built-in inflation pump. Press air release valve to deflate. 2、Square head\/waist support: Can support your head when is upright as well as relieve your neck and shoulder pressure. 3、Ergonomical design: more comfortable to use, ideal for airplane, car, bus, and train rides- or even at home or office for watching TV, reading, etc. 4、Adjustable firmness: Unlike memory foam or microbeads, you can adjust the size to your preferred inflation level and firmness. 5、Equipped with a storage bag, it is small and convenient. The pillow is easily vented and stored in the bag. You don't have to worry it taking up the packaging space. ----------------------- None ----------------------- 无