Reusable neck warmer, size M, beige. This was a gift, but I haven't used it because it seems like a hassle. It appears to be the type that you warm up with hot water. - Product Name: Neck Hot - Size: M size (inner diameter 95-100mm) - Color: Beige - Weight: Approximately 150g-160g - Material: TPU, 100% polyester - How to use: Reusable by soaking in hot water Please read the profile and understand before purchasing. Thank you for looking.