NitroMousse foam tubes provide a 100% flat-proof and durable alternative to traditional inner tubes for off-road motorcycles, while the Prolock 360 system allows for running extremely low or no air pressure by securely locking the tire bead to the rim NitroMousse Prolinx refers to the combination of Nuetech&';s NitroMousse foam inserts with their Prolock 360 bead lock system Designed to last longer than traditional mousses and provides increased traction Notes To ensure proper fit, see NitroMousse website. It is highly recommended to consult the manufacturer&';s specific tire fitment chart to ensure you get the right mousse for your particular tire brand and model.