SmartTech™ Polyurethane (STP) one piece technology is our innovative, proprietary manufacturing technique. STP is the key to comfort, performance and longevity and why we are “The Absolute Best” in anti-fatigue mats. STP allows our thick elastomeric and resilient core to permanently bond with our thin abrasion/stain/microbial resistant outer layer because both are made from the same cross-linked polyurethane molecules. The molecules bond (permanetly) using a process called thermosetting. What STP means for you is that the comfort and longevity of our mats are permanently locked into every fiber. It is this revolutionary, advanced technology that seperates Smart Step® from others and guarantees a minimum life expectancy of 7 years.