With its unique multi-layered design. The OysterPerle microbeaded mattress is made up of 3 main components The fine microbead top layer forms to the body shape, supporting and offloading the body or limb to maintain good positioning and relieving pressure points. The second layer consists of a compression web. Creating a suspension to the mattress and optimal ventilation. The final layer is a foam frame supporting around and under the microbeads and webbing, adding stability to the mattress.