The gibralter tiree memory 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 enchantedmagical foam and spring combinationlayer of memory foamexclusive sleepzone springssilver knit panelmicroquilted topmicroquilted mattress border4 handles and 2