The memorypedic flexi sleep mattress is made with an ortho foam material that is high density and provides superb comfort and support to your back the ortho foam material used in this mattress is hypoallergenic so will be suitable for anyone affected by allergiesthe material is also sanitised and anti dustmite for added comfort the mattress has a convenient zip off dry cleanable cover so you can keep it in pristine condition year after yearthis mattress combines ortho foam for high levels of