The Firm Rest Plus combines the ultimate support of the standard Firm Rest model, with the innovative cooling technology of an additional mattress cover, so you needn\'t choose between the two.The highly conductive properties of this clever fabric work to cool you 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. Firm support. Single - W: 90cm L: 190cm D: 18cm Small Double - W: 120cm L: 190cm D: 18cm Double - W: 135cm L: 190cm D: 18cm King - W: 150cm L: 200cm D: 18cm Super King - W: 180cm L: 200cm D: 18cm. 8 Year Guarantee - Signature Collection mattresses and bases. All claims under the guarantee should be made through the retailer where the bed was purchased. On Adjustable model purchases the remote control is guaranteed for 2 years.