Deep Sleep Collection 1800 TC Double Brushed Microfiber 4 Piece Sheet Set (Split/Dual King, Burgundy) Material is an athletic / performance grade, double-brushed Microfiber that is ultra-soft, breathable and wicks moisture away from your body. Upgraded elastic on the fitted sheet to stay put throughout the night. Fits snug on a 12-inch mattress all the way up to an 18-inch thick pillow top. Superior weave and excellent durability. Easy care, non-iron, and wrinkle free. Sheets will NOT pill or ball up. Finally, an oversized wider flat sheet for easy tucking. Split King Measurements: 1 Flat Sheet 108"x102" (267cm x 259cm) * 2 Fitted Sheets 39"x80" (99cm x 203cm) * 2 Pillowcases 20"x40" (51cm x 102cm)