The Ridge Flex Hip and Ridge Shingles are a Flexor SBS polymer modified asphalt hip and ridge cap for all shingled roofs. Ridge Flex is an easy-to-install, low profile roof accessory that provides resilient protection to hips and ridges, a strong defence for ridge vents from weathering, and long-lasting appeal. Ridge Flex features the Scotchgard Algae Resistant Shingle Protector from 3M to resist shingle discoloration due to algae growth. Malarkey roofing systems with algae resistant warranties require algae resistant hip and ridge shingles.