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: Small Double - W: 120cm L: 190cm D: 21cm Double - W: 135cm L: 190cm D: 21cm  The Drop Middle Firm Edge Pocket Base is designed to give you a deeper, softer comfort level while being constructed to allow the addition of solid timber drawer storage options. Constructed from sustainable timber, the precisely upholstered Dunlopillo firm edge pocket base supports a responsive pocket spring layer that works in perfect harmony with your Dunlopillo mattress. Seated inside a wooden frame the pocket springs soften the comfort of the mattress while providing a firm edge that prevents \'roll off\' from the side of the bed. One piece mattresses are supplied with drop middle firm edge pocket divans to prevent any feeling of a firm ridge in the middle of the bed, while pairs of mattresses, zip and link mattresses for example, are supplied with firm edge all round divan bases, allowing them to be separated to twin beds when required. Dunlopillo pocket bases have been designed to give you a deeper, softer comfort level while being constructed to allow the addition of solid timber drawer storage options. Base Dimensions: Small Double - W: 120cm L: 190cm D: 41.5cm Double - W: 135cm L: 190cm 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.