Bridgestone Dueler H/L 422 Ecopia P215/70R16 99S Tire 126880 The Dueler H/L 422 Ecopia uses an all-season tread compound featuring Bridgestone's unique NanoPro-Tech (Nanostructure-Oriented Properties Control Technology) to reduce rolling resistance and energy loss while maintaining dry, wet and wintertime traction. This compound is molded into a symmetric tread design that combines notched shoulders and intermediate ribs with independent center blocks for dry road tracking and traction. Four circumferential grooves are designed to help water flow from under the footprint to resist hydroplaning and enhance wet traction while notches and sipes increase the edges that bite into light snow. The tire sidewalls feature Bridgestone's Fuel Saver compound to further increase efficiency. The tire's internal structure includes twin steel belts reinforced by spirally wrapped nylon on top of a polyester carcass to blend ride comfort and durability.