100% Modal(Warp),85% Modal +15% Mulberry silk (Weft) Fit Depth:16 Inches Extra Deep Fit Fitting Method: Elastic Band Around The Edge To Fixate Fitted Sheet To Your Mattress Free Gift: One Laundry Bag Please kindly note the top of the flat sheet is very flat without a cuff. The label is sewn at the bottom of the flat sheet Modal fiber is extracted from plant fibers such as wood and pulp. Compared with other fibers, its moisture absorption and perspiration efficiency is 50% higher than that of cotton, and it is silkier than linen and other materials. This incredibly soft fiber is great for sensitive skin, and we've added 15% silk fiber to make it even more comfortable while you sleep. Fitted sheet is designed to fit snugly around the corners of the mattress and features a 16 inch deep pocket to accommodate most mattresses.