Fiberluxe, a combination of athermal fibre and a layer of HR polyether, provides extra-soft comfort and ensures continuous airflow while sleeping so it breathes better. The Rest Cell foam core provides stable, ergonomic support, ensuring continuous airflow through its alveolar structure. Versalles Cell is a flippable mattress with four embroidered handles, making it easier to move, with high firmness and mid-low breathability. All Sema mattresses come with our permanent, effective dust-mite treatment B.A.T. (dust-mite treatment).