The Assurance TripleTred All-Season's directional tread pattern features three distinct tread zones specifically tuned to deliver traction in dry, wet and wintry conditions. The Dry Zone features large shoulder blocks to provide confident maneuvering on dry pavement. The Water Zone uses sculptured Aquachannel grooves that help evacuate water and slush to increase traction on wet roads. And the Ice Zone features a unique tread compound made of innovative polymers mixed with traction-enhancing volcanic sand and glass fibers. This unique compound is molded into a continuous center rib with multiple biting edges to enhance gripping traction on slick roads, packed snow and ice. The Assurance TripleTred All-Season tread pattern also features Goodyear's Evolving Traction Grooves that begin as 1/10" wide sipes to maximize footprint contact when the tire is new, and broaden into wider lateral grooves as the tire wears. Compared to conventional sipes, Evolving Traction Grooves generate more rain, slush and snow traction longer into the tire's life.