These upper door attachements are great for the colder season. They are made out of an aluminum tubing frame with the black and clear vinyl door. They do have a zipper to open up the window itself and for the door handle to be opened. These doors are only availbe to work on the 2015-2017 900 Trail RZR models with they Ryfab Windshield, Roof, and Rear window. These do take 3-4 weeks to build do to limited quantities of materials.