Men's knit cap from 3M. Color: Gray Size: 56-59cm Material: Body: 100% Acrylic, Lining (crown): 100% Polyester. *Crown refers to the part of the hat inside, around the top of the head. It's made of a fleece-like material. I believe I purchased this within the last few years, but I've only worn it a few times. There are no noticeable stains, but please understand that this is a used item. *Please be aware that the following may occur: - Recycled packaging materials may be used. - The shipping method may be changed from Rakuraku Mercari Bin to Yu Yu Mercari Bin (or vice versa) at the time of shipment. - The item may be compressed for shipping.