With 8cm of reflex foam around the springs this mattress prevents you rolling off the mattress during the night whilst the coil spring system provides high levels of support for your body the extra firm edge of the mattress also allows you to sit on the edge without damaging it making it a long lasting investmentthe memorypedic reflex coil ikea size mattress is not just supportive but also hypoallergenic with a handy sanitised dry cleanable cover so this mattress is ideal if you are looking