This topper includes 2.5 cm depth of 100 per cent memory foam and is designed to be placed on top of the existing mattress to benefit from extra comfort. This is suitable for bringing back to life an old spring mattress which is lacking in comfort. Memory foam, originally designed for NASA missions, it is soft and pliable following the outline of your body to provide high support to your body and spine allowing your body to find a comfortable sleeping position. - 2.5 cm layer of 100% memory foam - The foam moulds to your body providing personalised comfort and support, it ensures your weight is distributed evenly, relieving pressure from your back, hips and shoulders. - Designed to provide orthopedic support - Made in the UK to British safety standards and regulations - Cover not included