AirWeave AirWeave This is the top-of-the-line S-Line model. I used it for about a week and haven't used it since. I used it with a bath towel wrapped over the cover. The pillow cover and main body cover have been cleaned. There are no noticeable stains or marks. Includes: 1 dedicated bag 1 cover 1 ring core 2 sheet cores (unused) Size (approx.): Width 66cm, Length 40cm, Thickness 7-11cm Price: ¥33,000 Returns and exchanges are not accepted to prevent switching of products. I believe the condition is good, but it's based on my personal assessment, so please ask any questions you may have before purchasing. From the official website below: □ Excellent breathability improves sleep quality with a clean pillow. The head gets the hottest during sleep, and some pillow materials can get stuffy. The core material of the AirWeave pillow is 90% air fiber®. It is lightweight and highly breathable, and moisture does not accumulate inside. Excellent breathability lowers the core body temperature, creating a comfortable and deep sleep environment. Also, the cover can be washed in a washing machine, and the core material can be easily washed with a shower, so it can always be kept clean. This product is highly recommended for those who sweat a lot during sleep. □ An innovative structure that maintains the ideal head height whether you sleep on your back or side. To maintain the ideal head height whether you sleep on your back or side, the sides of the pillow are adjusted to be firmer than the center. Instead of creating unevenness on the surface of the pillow, the firmness and softness are continuously changed within the air fiber®, allowing you to turn over smoothly. It supports smooth turning over by straightening the axis of the body. □ Adjust to your preferred height for ideal comfort. By removing and inserting the multiple sheet cores inside, you can freely adjust the overall height of the pillow. It is structured to accommodate the firmness of your bedding, body type, physique, and preferred height while trying out the comfort. Even those who are concerned about a straight neck caused by long hours of using smartphones or computers can have their neck line naturally aligned during sleep, without hindering comfort.