The Sunset Chair is not included. The part that touches the mouth has been disinfected. Also, when inflating, tighten it without pressing the adjuster. The Helinox Air + Foam Headrest is a foam-filled air pillow designed to be attached to Helinox chairs, providing dedicated head and neck support. [helinox +2] Key Features • Structure: An air pillow with foam (cushioning material) inside, providing more "stability and firmness" than an air-only pillow. [helinox +1] • Attachment: Attaches to the Velcro (hook-and-loop fastener) on the back of the chair or the headrest roll structure, compatible with Chair Two / Sunset Chair / Beach Chair / Savanna Chair, etc. [kellac +2] • Size and Weight (Representative Values) • When expanded: Approximately 50 cm x 23 cm x 13 cm (length x width x height) [montanic +1] • Weight: Approximately 170 g (approximately 186 g including the stuff sack) [webshop.montbell +1] Usability and Advantages • Compact Storage: Can be deflated and rolled up, and stored in the included small case (approximately 22 cm x 10.5 cm), so it fits in the storage bag of the Helinox chair itself. [helinox +2] • Comfort: Significantly improves neck and head support when napping while sitting, such as at the beach, camping, or in a car, and is especially suitable for long hours of outdoor sitting. [kellac +1] Price and Purchase Example (for Japan) • The regular price at authorized dealers in Japan is ¥5,830 Please refrain from purchasing if you are concerned about it being a used item.