This Duvet cover is 100% cotton, twin-sized, Pb Teen brand by Pottery Barn, in very good condition. It has one mark that I have found, see photo. I have not tried to remove it, so I'm not sure it will come out with stain remover. The other side doesn't have a spot that i can see. The Duvet has button closure. Machine washable, tumble dry, see label for details.
The item weighs 2 lbs, 7 ounces, so the package will weigh a bit more. Ships fast by USPS GROUND ADVANTAGE, same or next business day after purchase.