The HALO Bassinest Swivel Sleeper’s uniquely shaped mattress should be covered with this custom sized Bassinest Fitted Sheet. This sheet is designed to perfectly fit the hourglass-shaped mattress and features an envelope design for a secure fit, ensuring the sheet does not come loose during use. The Fitted Sheet fits all Bassinest models including the Essentia, Premiere and Luxe Plus series. Made of 100% pre-shrunk cotton, with a 200 thread count. Available in white.