Quality british vita reflex foam is used as a base foam this quality foam works in harmony with the visco elastic memory foam giving the mattress more comfort and support the mattresses are covered in luxury removable woven damask cover this cover is hypoallergenic anti microbial and fungo static these combined attributes can significantly help to reduce dust mites the full specifications of the viscostar are 25cm of visco elastic designed to maximize your contact with the mattress th