Designed for all-year performance, the ClimaFlex 4S tire from Fortune is an all-weather tire. It has the M+S rating for mud/snow traction and the 3PMSF rating for severe winter service. The ClimaFlex 4S features Fortune's exclusive "Fortune Four" tread design, including strategically placed sipes, snow enhancers, and a continuous center rib for improved stability and handling. The ClimaFlex 4S is backed by a 70,000 mile limited manufacturer's tread life warranty.