SleepSoul Nimbus Memory Mattress in a Box - 3ft Single; Boasting high-tech memory foam, the SleepSoul Nimbus is an ideal solution for those who prefer a medium and comfortable support. Upholstered in a soft to touch stretch knit quilted fabric, the mattress features a core of resilient reflex foam, topped off with memory foam. Temperature sensitive, the memory foam layer is designed to soften when in contact with body heat, moulding itself to your contours. Its advanced reflex foam core is designed to conform to your body39;s shape by distributing your weight evenly, resulting in reduced pressure points. This combination promotes good circulation and spine alignment for the user, resulting in a deep and restful nights sleep, every night. To enhance to life of the mattress, we recommend that you rotate it regularly from top to bottom, but as its one-sided, there is no need for it to be flipped over.