Made of the finest, long-staple, 400-thread-count combed cotton sateen, this silky-soft duvet cover has a wrinkle resistant finish, shrinkage control, and an elegant satin stitch. This duvet cover is certified by Oeko-Tex® to be free of all harmful chemicals. Hidden button closure. Up in Maine, where Royal River Trading is based, they know the importance of warm, but not overly bulky or heavy, comforters to stave off the chill of winter nights. Royal River Trading offers down comforters, equally plush pillows and other types of bedding. All of its products are made to last, so that you can rest easily--and luxuriously--knowing that these bedding essentials will keep you toasty and comfy for many seasons to come.