Patrick Michelle microfiber sheets are wrinkle free, fade resistant and are one of the softest & most luxurious, microfiber sheets available. Our premium yarns are two times more durable than cotton and perfect for every season. Each sheet set includes one fitted sheet (two extra long twin fitted sheets in the Split Kings) which will fit up to a 17" deep mattress, one flat sheet and two pillow cases (one in twin set). Patrick Michelle sheets have wide corner straps on each corner as well as elastic all around on the fitted sheet to prevent your bedding from slipping or bunching, giving you the most comfortable nights sleep possible. Patrick Michelle sheets also have a one year warranty against factory defects, including balling and pilling.