Excellent Support: High-density memory foam conforms to the curve of your neck. It provides moderate support for your head, reducing strain on your neck and shoulders during flights or desk work. It is also resistant to deformation even after long-term use. Breathable Design to Prevent Stuffiness: The cover is made of soft microfiber material that feels warm against the skin and is highly absorbent. The internal three-dimensional structure promotes airflow. It keeps you warm in the cold winter months, making it ideal for those who are sensitive to the cold. 360° Relaxation Anywhere: Maintains the optimal height at any angle, whether leaning forward (PC work), leaning back (reclining in an airplane), or sideways (by a train window). It fits without deforming even in the narrow seats of the Shinkansen (bullet train). Compact Storage & Portability: Transforms into a pouch size when placed in the included storage case. It can be stored in a bag, so it won't add to your luggage for business trips or travel. Washable Cover for Maintaining Cleanliness: The removable cover blocks sweat and dirt. Machine washable (net recommended) for hygienic long-term use. An inner cover is included to prevent color transfer to the memory foam. jp1.