The Pembroke (Rona) Part of the Enchanted Collection a collection which uses Sweet Dreams' own unique Sleepzone spring system. The Sleepzone spring system is a purpose designed spring system for developed for sleeping comfort with twice as many springs as a traditional bonnell unit creating a blissful sleep that is truly Enchanted. Conjuring extra softness Pillowtop for an extra-soft layer of enchantment Exclusive Sleepzone springs Knitted mattress cover with modern fabric border Vertical stitched border 4 handles & 2 vents No turn mattress