1400 traditional firm pocketed springs Natural fibre fillings including wool and silk Firm durable polyester fillings Traditional damask belgium cover A sanitized surface with antibacterial treatment to help guard against dustmites. 3 rows of side stitching Hand tufted Chrome vents to help the mattress breathe Easy care non turn mattress All zip mattresses can be separated into two single mattresses or zipped together to create one large mattress. The zips are hidden under a fabric layer so no join can be felt when the mattresses are zipped together