The ropebag typical large tarp is sewed in and unfolds in a massive 150x120cm area for your climbing gear. It is Polyurethane coated to make it moisture resistant and to keep your gear as dry as possible, while you get ready for the climb. When you are done, hold up the tarp on its edges and all your gear slides right back into the bag - pack all your stuff in seconds, or move to the next route with ease.