Naturesmart™ mouse pads do not use petroleum-based materials such as EVA, PVC, or PU. No glue or harmful chemicals are used to attach the soft-cloth surface to the non-skid base. This naturesmart™ mouse pad has an Eco-base™, a non-skid base made with 60% natural rubber, and 40% post-industrial recycled material. - Soft -cloth top for maximum comfort and tracking - Non-skid Eco-base is made with 60% natural rubber and 40% post-industrial recycled material - Glue-free assembly does not use or create any harmful chemicals