Top Split King Size Sheets are made for head split king mattress sold by the sleep number bed store. Made from the most comfortable & softest 100% Bamboo Viscose material, the Split-Top Fitted sheet has a 39" split from the top of the mattress and is made with 6 corner pockets. Fitted can fit up to 18" deep mattress and it comes with wings (Extra fabric) in the middle to keep the fitted in place that will allow each side to move freely. Top Split King Adjustable Sheet Set contains one flat, one fitted sheet and two pillowcases.•  100% Bamboo Viscose •  Ultra-Soft, Thick, Long Lasting•  Adjustable Breathable Solid Sheets•  Flats and pillowcases are made with 4" Hemming•  Perfect for people with allergies & chemical sensitivity•  Deep Pocket, Fits up to 18'''' deep mattress•  Fully Elasticized fitted sheets for a secure and snug fit•  Royal Tradition•  Machine-Washable in Cold Water, Delicate cycle with mild detergent. No Bleach. Tumble Dry on low heat.Available Size Include:•  Split Top king adjustable Bed Sheets Set Includes: 1-Flat Sheet 110" wide X 102" long, 1-Top Split Fitted Sheet 78" wide X 80" long with 6 corner pockets, and 2-King Size Pillow Cases 20" wide X 40" long each.