IKO Marathon Plus AR is a time-tested, traditional 3-tab roofing shingle. Its weather-resistant design is based on a solid construction of durable fiberglass mat to help shield homes against the forces of nature. The classic design of IKO Marathon Plus AR will flatter any style of home. The algae-resistant granules embedded into these shingles will help control the black streaks caused by blue-green algae and keep them looking great for years to come.