What is the Layla Mattress cover made from? Layla January 23, 2019 00:51 Updated Follow The Layla Mattress zipper cover is made of 66% polyester, 30% viscose, 4% poly/lycra, with a ThermoGEL cooling agent. Related articles What are the Dimensions and Weights of the Layla Mattress? How do I order an additional or replacement cover for the Layla Mattress? What if I receive my order but the items are wrong or missing? Can I wash the Mattress Cover? What size box does the Layla Topper ship in? Comments 0 comments Please sign in to leave a comment.