Purchased in June 2025 and used for about four months. It's in very clean condition with no stains or wear. The cover has been washed, so you can use it comfortably. This item does not have the original box and retails for 11,000 yen. Thank you for your interest. ※ If you purchase this item together with the "Cushion Keeps Cushion" currently on sale, I can offer a discount to 14,000 yen for both. The retail price for both items is 22,000 yen, so it's a great deal even though they are used. Please apply if interested. ◆ "Lumbar Pillow" that achieves ideal posture and comfortable sitting in your usual chair. The second product in the Keeps series born from sleep science, this lumbar cushion effectively supports your lower back. ◆ For those who tend to slouch or lean forward while concentrating on work, this cushion naturally supports your posture. By filling the gap between your back and the chair when you have correct posture, it helps you maintain the correct posture with ease. ◆ Uses Nishikawa's unique "Double Fit System" to stabilize bone positions and guide you to the ideal posture. By gently holding the lumbar vertebrae, ilium, and ribs, it helps maintain the ideal lumbar spine line and stabilizes the pelvis, naturally maintaining the ideal posture. You can maintain a comfortable posture even when sitting for long periods. ◆ The wings on both sides of the cushion move when you lean back, fitting various body types. By providing firm support from the back and both sides, it supports the posture of a wide range of people, regardless of gender or body type. ◆ When using the lumbar cushion, the pressure on your buttocks is distributed. Furthermore, by using it together with the "Buttocks Pillow" from the same series, the pressure is further distributed, allowing for a more comfortable sitting experience. ◆ Uses high-resilience, durable urethane. Tested for 80,000 compression cycles, ensuring long-lasting comfort. ◆ Comes with a fixing belt, so it fits securely on various chairs. Perfect for chairs used for telework, studying, dining chairs, and offices. It has a wide range of applications. (Compatible with chair backrests with an outer circumference of approximately 80-140cm) ◆ The outer fabric is treated with antibacterial processing for hygiene. The side fabric can be removed and washed, so it's always clean. ◆ Many effects have been verified through joint research between Kanazawa University and Nishikawa Co., Ltd. ◆ Size: 51X31X21cm ◆ Outer fabric: 100% polyester (antibacterial treatment) Filling: Urethane foam ◆ Made in China