Our Deluxe Orthopedic Natural Air Flow mattress is very lightweight and firm. This mattress has a solid 5.5 inch thermo bonded polyester core that is strong and firm yet incredibly lightweight. The outer cover has a dust mite barrier, is hypo-allergenic, anti-microbial and made of an easy to clean and PVC-free material that helps you make sure your baby's sleeping environment stays healthy and sanitary. The natural air flow pocket helps keep the mattress fresh. The cloth binding is sewn with a special lock stitch that helps prevent edge seam from splitting and moisture from entering. Proudly . from domestic and imported sources.