Ideal Pet Ruff Weather Dog Door, White, X-Large, 21.62"L x 5.75"W x 13.94"H

We have three dogs, 2 large Labradors and a small dog that weighs about 20lbs. All three are able to use this door very easily. It does take some training and patience, but they are easily becoming comfortable with it. There is no draft or air leakage without using the storm dorm cover. The two flaps are effective. Installation took about an hour, but was very easy. It came with a template to mark out the opening. Highly recommend. My picky wife was even pleased with it aesthetically.

The instructions were well written and included a nice template to make cutting the hole location easy and precise. There is a vinyl strip around the edge of the outside section which seals nicessly against the door. However, if the door was not the type with a flat surface, additional caulking would be required. My dog learned quickly how to go through the door. The flaps are held in place with a magnetism strip along the bottom of the frame. Should work well to keep the weather out. Although a little pricey, it is well made and should last.