Mattress: Get an open coil spring memory mattress. Hypoallergenic: Made from 500gsm polyester and knit fabric. Depth: Choose from a 6" or 9" deep mattress with an 8mm layer of memory foam. Sizes: Valid in small single, single, small double, double, king or super king. Comfortable: Features distinctive spiral pattern stitching and is designed to contour to your body's natural shape. Support: Offers full head to toe anatomical support and aims to relieve pressure points and promote blood circulation. Cool Blue Memory Foam Spring Mattress | Small | Living Social