The Smartfil Technology Mattress Pad is impressive to say the least, a great option for eco-friendly buyers! The smartfil technology transforms collected recycled plastics into small pellets that are heated and spun into very fine, soft-thread, eco-friendly premium polyester fiber. The polyester fiber is then filled into a soft touch fabric shell that consists of 4” square quilt patterns offering even fill coverage and comfort. The fibers offer anti-microbial protection and act as a shield preventing bacterial growth, leaving you with a clean and fresh sleeping environment, while the 15” fully elasticized stretch-to-fit skirt offers convenient off/on use. This product is easy to care for - simply machine wash and dry on delicate to achieve your preferred level of freshness.