Purchased in January 2025. I am selling it because I have no plans to use it. The retail price is 49,500 yen (tax included). Thank you. The following is the manufacturer's description: Good Open Airs MAKES has created a stylish and ecological down sleeping bag in collaboration with NANGA. NANGA's proprietary waterproof and breathable material, AURORA TEX, is used, providing a high level of waterproof performance. The all-black color gives a stylish presence. The NANGA stealth logo is scattered on the outer fabric. It was created with outdoor activities in mind during the relatively cold months from November to May. Equipped with six loops on the bottom, it can be fixed to a mattress or cot with ingenuity, such as attaching a tension cord. *Cords and mats are sold separately. A sleeping bag series with excellent functionality. Comfort temperature -2℃ / Lower limit temperature -8℃ ■Outer fabric: 40dn Aurora Tex (waterproof and breathable fabric) ■Lining: 15dn ripstop nylon ■Down: Recycled 90-10% (700FP) ■Down amount: 600g ■Size: Regular (height up to 178cm) ■Internal structure: Box quilt structure ■Features: Shoulder warmer, draft tube ■Storage size: Φ17x27cm ■Body weight: 1300g ■made in japan Recycled down is used out of consideration for the environment. (※Recycled down is an ecological and economical down that is made by collecting used down products and rewashing and refining them.) 700FP recycled down is used to achieve both lightness and heat retention. The box quilt structure is adopted to efficiently utilize the heat retention performance. A shoulder warmer and draft tube are provided to prevent the entry of cold air. The luminous resin fastener slider uses special YKK parts that reduce biting and provide good visibility. Shoulder warmer: By attaching a down-filled tube to the shoulder area, it prevents the entry of cold air and prevents the heated air from escaping. Draft tube: A down-filled tube is provided along the zipper to prevent cold air from entering through the zipper gaps and improve heat retention.