The 80-percent UV block exterior roller shade combines Coolaroo knitted fabric with a smooth operating roller clutch mechanism. All components are UV stabilized for outdoor use. The aluminum head rail and bottom rail will prevent sagging and bending and tie downs are included to secure the bottom rail for added protection. The fabric blocks up to 80-percent of harmful UV sun rays to provide maximum heat block and glare reduction while still providing daytime privacy in a range of patio, window and other outdoor applications. Comes with crank handle for easy movement for up and down position of shade.