BRAND NEW IN SEALED BAG... The wiper covers are made out of heavy duty, water repellent neoprene.  Simply pull apart the hook and loop closure along the length of the cover to open.  Then slide the cover over the entire wiper blade, and then press hook and loop together.  They are designed to extend the life of your wipers.  You can use them in Blinding blizzards, Hurricane force winds and scorching sun.