Meet the Freedom Patio Panel Pet Door from PetSafe: an elegant pet door that lets your dog come in and go out as she pleases through your sliding glass or screen door. It has panels with heavy-duty aluminum construction. It comes with a sealed flexible flap system to keep the heat and cold outdoors.
Freedom Patio Panel Pet Doors are weather resistant. They can be installed without a whole lot of hassle. You can get the X-Large version for $210+.