The brennington guest bed with mattress and bedding bundle is great for catering to unexpected guests or for kids sleepovers in addition this set comes with 2 hollow fibre pillows 2 reflex foam mattresses and 2 105 tog hollow fibre duvets the mattresses consist of a thick layer of high density reflex foam upon a sophisticated spring system the reflex foam contours to the shape of your body but unlike memory foam bounces back quickly when pressure is removed the mattresses have a medium