This premium quality Tontine Greensphere Natural Anti Allergy Mattress Topper is filled with Eco-Fibre Sustainable Polyester and features a GreenSphere treated premium cotton japara cover to provide plant-based, chemical-free protection & elimination of bacteria and dust mites which are a common trigger for asthma and allergies. Specially designed to add a lofty layer of comfort to the mattress while you sleep. To help it stay secure and in place on your mattress, this topper has a fitted skirt. For easy care, this topper is fully machine washable.