Brain Sleep portable neck pillow. Retail price: 13,200 yen I am selling this as I have hardly used it since purchasing it and will not be using it in the future. ★ As a bonus, I will also include the following item purchased on Amazon: MgDa Nap Pillow, Desk Office, Arms Don't Go Numb, Comfortable to Sleep On, Low Resilience, with Pouch, Gray Retail price: 2,999 yen There are no smokers or pets in the house. Thank you. ※ The following information is from the Brain Sleep brand website. ■ Width: Approximately 580mm x Depth: Approximately 300mm x Thickness: Approximately 30mm / Approximately 40mm (longest part) Adjuster belt: Approximately 80mm to approximately 620mm (total length) ■ Weight Approximately 210g ■ Materials Filling: 100% Polyethylene Cover: Mesh fabric: 100% Polyester, Gusset fabric: 100% Nylon, Tape: 100% Polypropylene Brain sleeps, super breathable Supports the neck, For the optimal sleeping posture Made of over 90% air layers, Creates a layer of air between the pillow and the head to release heat and moisture. By reducing the rise in body temperature during sleep, it maintains the best sleep until morning. The high-resilience three-dimensional fiber material supports the head and neck, preventing sinking. Provides comfortable sleep with the correct sleeping posture. Prolonged desk work and sitting for long periods put a heavy burden on the lower back, causing back pain. Simply place it on the backrest, and the high-resilience three-dimensional fiber will support you. Both the cover and the filling can be washed completely, keeping it clean at all times. Uses sustainable materials, friendly to the earth. The filling can be rinsed with shower water to remove any dirt or odors. After that, just air dry. The dedicated cover can be washed in the washing machine using a laundry net.