The Memory Foam Topper is designed to give you that extra comfort you require to get that good night's sleep. Developed by NASA, memory foam is a unique layer of high density visco-elastic polymer gel which is heat and pressure sensitive. Recommended by chiropractors and doctors alike, it gives an elastic ability which allows it to conform to your body shape to relieve pressure points across the body. This improves blood circulation and improves your sleep. Features at a Glance Mattress Type Memory Foam Topper Mattress Finish Mattress Firmness Medium Soft Mattress Depth 4.7 cm Mattress Features orthopedic, hypo-allergenic, anti dust-mite, vacuum packed, optional removable cover, pressure relief, UK manufactured Guarantee 1 Year Manufacturer Warranty 5 Years