Dreamland Double Dual Control Heated Mattress Protector Quilted Cotton 5 "Great to keep warm" Ms Sutcliffe 11 January 2021 I bought this from Lakeland in winter 2019. I switch it on to get warm for about 10 minutes before I get into bed, for the best result. You can then choose your heat setting to keep warm for an extra hour or eight hours. I find the setting of three for one hour is perfectly adequate. I would recommend this item.