Features :1.Ergonomic Design:Accords with the neck and head curve of human, it provides neck and head support, keeps comfortable head and neck posture in travel, making your journey more relaxed and enjoyable.2.U-shape promote blood circulation and relieve cervical pressure. Can adjust collar size freely and adjust elasticity. 3.Slow rebound memory foam pillow core, comfortable, breathable and supportive, so that you'll feel like sleeping on the cloud.4.With Storage Bag:Small volume,foldable, easy to carry and with storage bag space saving.5.Great for sleeping in your seat during long plane flights or sitting upright in any type of chair.Specification:Material: Polyurethane+SpandexSize: 12cm(height)includes:1x pillow1x pillow cover