Quarrix Flex Roll Ridge Vent is by far the most flexible ridge vent product. When compared to Rigid Roll, Aviator, or Multi Roll, the Flex Roll is also the most economical option. Quarrix Flex Roll Ridge Vent is engineered with non-wicking and non-corrosive nylon material to prevent clogging. There is no fabric, so you won’t have to worry about trapped dust and cut off air flow over time. It is also much more flexible than a harder HDPE plastic. It is incredibly lightweight and east to install. Flex Roll should only be installed under metal roofing and asphalt shingles. It is the best ridge vent for manufactured housing applications.