The Windsor designer shingle elevates the look of your roof with a higher profile, creating an enhanced dimensional texture for a more pronounced design.  For a more dramatic aesthetic, upgrade to the thicker, heavier Windsor XL. Windsor and Windsor XL are engineered with the fortified durability of NEX™ polymer modified asphalt technology to promote superior granule adhesion and extreme weather protection, including Class 4 impact resistance. This product also features Scotchgard™ Protector from 3M for added protection against black streaks caused by algae as well as Smog Reducing Granule Technology.