1500 individually nested pocket springs and a range of natural fillings make the sovereign 1500 mattress a wonderfully comfortable choice this traditionally crafted mattress is designed to support the natural contours of your body relieving pressure points while you sleep please note spring count refers to a 5ft kingsize modeldimensionsbull single w 90cm x l 190cm bull small double w 120cm x l 190cm bull double w 135cm x l 190cm bull kingsize w 150cm x l 200cm bull superking