The Tobago uses the very best natural fillings including a blend of soft smooth cashmere wool with moisture-absorbing silk. The triple side-stitching allows full use of the single sleeping surface. A Turn Free, rotate only mattress, the Tobago is covered in our ChemFRee mattress cover. Delve deeper and you'll find an impressive array of spring layering; the Revolution spring-within-a-spring system for deep support; HD Titanium Alloy with 4000 and 2500 springs per layer and 5000 spring count Microlution with its airflow properties which circulate air to keep you cool as you sleep. Choose from Gently supportive, Medium support or Firm support.