Our most admired model the VenusBed encompasses all of the benefits and features; you would look for in a lavish sleep system. Offering a more luxurious appearance, the VenusBed by AstraBeds.com utilizes a naturally treated removable and washable stretch terry/velour cover zippered cotton stretch terry/velour cover, to be dust mite and allergen free. Beneath we feature NASA-developed 5.3lb pressure relieving material, ultra thick. Below is our Air-Flow layer which promotes air circulation within the mattress to keep you cool and comfortable while you sleep. Importantly our Highly flexible orthopedic based foam core designed to retain spinal alignment and back support.