The coolflex pocket 1000 mattress is an exclusive model to mattressnextday and the cheapest 1000 pocket sprung mattress you find online or instore produced in the uk using individually nested pocket springs the coolflex pocket mattress features a generous 1000 pocket springs which are designed to offer the optimum level of support across the whole mattress excellent support from the pocket springs is complimented with a luxury quilted finish ensuring that your sleep is as comfortable as possible