Reusable, large-sized gray neck warmer. - Color: Gray - Size: L - Product Name: NECK HOT - Usage: Reusable - Material: Unknown (See image for details) Useful for everyday life, outdoor activities, and emergencies. I'm selling it because I don't go out much and don't use it. (Used only once) [Reference] Amazon / Size M: ¥586, Size L: ¥1470. Comes with the original box. Thank you for looking.