It's herewww.marksandspencer.com/pure-cotton-slip-maxi-dress/p/p60209586?image=SD_01_T42_6005_Y0_X_EC_90&color=BLACK&prevPage=plp
100% cotton, simple, comfy but still elegant, cheap, doesn't seem to wrinkle, perfect for holidays. Even wore it with tights and a sweatshirt over on plane and then stripped off tights and sweatshirt and was instantly ready for sun!