Check the listing for details. Top Split Flex California King Sheet 4 pc set For Sleep Number 1900 Deep Pockets. Condition: New with tags. Listed at 59.99 USD. ULTRA SOFT SHEETS: Our proprietary hydro-brushed fabric is ultra-soft, lightweight, and airy to keep you warm in the winter and cool in the summer. Available in a wide range of colors to compliment any bedroom. 4-PIECE TOP SPLIT CALIFORNIA KING SIZE BED SHEET SET: 1 California King Flat Sheet, 2 King Pillowcases (20" x 40"), 1 Spilt Top Cal King Fitted Sheet with all-around elastic (not just in the corners) (72" x 84" x 15" Pocket). Extra deep pockets grip and fit mattresses up to 15". Extra Elastic straps on the sides to prevent fitted sheet to get pulled from the mattress. ALL-AROUND ELASTIC: The fitted sheet has elastic all-around to grip and fit the mattress better and to keep it in place all night long. EXCEPTIONAL QUALITY: The finest quality microfiber yarn is hydro brushed for an unbelievable soft feel without harmful chemicals and made to last.ROYAL BLISS PROMISE: If you don’t love your king sheet set for any reason, send it back and we’ll make it right.