GUNZE Knit Trunks - Brand: the GUNZE - Material: Body: 100% cotton; Waistband: 45% nylon, 45% polyester, 10% polyurethane - Size: M - Color: Medium Gray Thank you for viewing. This is a GUNZE knit trunks product. 100% cotton, suitable for tumble drying, and has deodorizing effects that cut odor components by 90% (according to the product page). I purchased a set of 3 from the official online shop, and this is one unused item. It has been stored unopened since purchase, but it is a home-stored item, so please refrain from purchasing if you are concerned.