Oversized sleep shirt. Polished silk. Our glossy, machine-washable silk in a flowy, long-sleeved silhouette. *411* Use this as a guide. Preference is a huge factor — if you're near the top of a size range and/or prefer more coverage, you may want to size up. Hits at the high hip. Finished with beautiful french seams. *FABRIC* Negative's 17mm, 100% washable silk is sand washed for the most luxurious finish. Navy is an inky deep blue tone Machine wash cold, dry flat, cool iron, or dry clean, wear often.