With a generous layer of 100% pure Dunlopillo latex that is resilient, responsive and completely noise free, the Royal Sovereign Plus is the timeless classic of the Signature range but with the addition of an innovative, cooling mattress cover.This cover has been developed using highly conductive properties that work to cool your temperature by drawing heat away from your body. Premium mattress cover with Innovative Cooling Technology. Deep core made of breathable, responsive latex. 7 comfort zones. Pressure relieving. Reduced effort needed for movement throughout the night, resulting in improved REM sleep. Naturally anti-allergenic, anti-bacterial and anti-microbial. Completely noise free. Actipro Technology probiotic treatment: the natural solution to allergens, bacteria and odours. Maintenance free: no need to turn, flip or rotate. Medium support. Mattress Dimensions: Single - W: 90cm L: 190cm D: 21cm Long Single - W: 90cm L: 200cm D: 21cm Small Double - W: 120cm L: 190cm D: 21cm Double - W: 135cm L: 190cm D: 21cm King - W: 150cm L: 200cm D: 21cm Super King - W: 180cm L: 200cm D: 21cm.  Driven by our blueprint for comfort, the slat system has been designed to flex to your body weight and movement offering a firmer level of support and comfort compared to the sprung edge base. The Dunlopillo slatted base incorporates our supremely comfortable sprung birchwood slat system. The slat system has been designed to flex to your body weight and movement offering a firmer level of support and comfort compared to the sprung edge base. This system also dramatically increases airflow beneath the mattress, which in turn enhances the natural breathable characteristics of Dunlopillo latex. The firmness of the system can also be controlled through the use of cleverly designed comfort adjusters positioned in the lumbar region of the system. Moving the adjusters to the outside edge of the system will create a firmer feel, whilst positioning them centrally will create a softer feel. The slatted base has also been designed to allow for the addition of our solid timber drawer storage options. All drawers are assembled from solid hardwood components, using dovetail joints for strength and feature smooth operation runners. Base Dimensions: Single - W: 90cm L: 190cm D: 41.5cm Long Single - W: 90cm L: 200cm D: 41.5cm Small Double - W: 120cm L: 190cm D: 41.5cm Double - W: 135cm L: 190cm D: 41.5cm King - W: 150cm L: 200cm D: 41.5cm Super King - W: 180cm L: 200cm D: 41.5cm All screens vary in colour reproduction and whilst every effort has been made to display the colour as accurately as possible it is for guidance only. Please note, the headboard pictured is not included but is available to purchase separately. You can browse our range of Dunlopillo headboards here.