Landmark® ClimateFlex® polymer modified asphalt shingles reflect the same high manufacturing standards and superior warranty protection as the rest of CertainTeed's line of roofing products. Landmark ClimateFlex shingles are built with the industry's toughest fiber glass mat base, and their strict dimensional tolerance assures consistency. Complex granule color blends and subtle shadow lines produce a distinctive color selection. Landmark ClimateFlex polymer modified shingles are produced with the unique NailTrak® nailing feature.