Sizes: Choose from 26 sizes fitting Single, Small Double, Double, King or Super King beds.. Firm core: Combine a firm core with the elasticity and softness of Viscoelastic making your rest hours perfect. Mattress: Get a 25cm Bio Artic Visco mattress. Advanced: Cover-to-cover padding designed to provide high comfort for the body. Features: Highly breathable fabric guaranteeing the correct ventilation. Design: High-quality, velvety lead grey upholstery fabric. | Bio Artic Visco Mattress - Single