Firmness: Soft/medium. Mattress topper: Give yourself the best nights' sleep with a comfy bounce back mattress topper. Cover: With a 233 thread count cover. Features: Anti-allergy filling with a cosy super bounce back feel. Sizes: Single, Small Double, Double, King or Super King. Machine washable: This topper is machine washable, making it extra easy to keep your bed fresh and clean. Bounce Back Mattress Topper | Single | Living Social