In the past, they were designated with just an "M+S" (Mud and Snow) symbol and are sometimes labeled "all-weather" tires even though they're not. However, the Three Peak Mountain Snow Flake (3PMSF ...

Unlike an all-season tire, an all-weather tire features the same snowflake and mountain symbol as a winter tire, meaning it’s almost as capable in the snow and slush as a dedicated winter set of ...