Hybrid spring memory foam mattress is a universal model found in our lives, featuring even levels of body contouring and push-back, or hug, without feeling too soft or too hard. We have given great notice to the cover of the mattress. Hybrid spring memory foam mattress is made of covers that are not at all toxic. Forming part of the ibessy prestige medium mattresses are pocket springs that sit in individual fabric pockets and are nested to give 100% coverage across the mattress enhancing support and eliminating noise. We natural talalay latex, a naturally durable cushioning material that conforms quickly to the shape of your body, providing excellent support.