- Alignment Verification System - Traction grooves - PolarPlus Technology - M S rated - Carries the Three-Peak Mountain Snowflake (3PMSF) symbol - Short sipes on both shoulders of the tire visually alert the driver of any misalignment and allow for correction before tires are ruined - Improves snow-on-snow traction and grip - Silane additives enhance grip on slippery roads, reducing stopping distances - 6 year warranty