Ideal Ultra Flex (aka Air-Seal) pet doors are constructed with a tough ABS plastic frame and feature the energy-saving Ultra-Flex flap. The flap is made of three dual pane LEXAN hard panels with an air gap in-between for maximum energy efficiency and wind resistance. The plastic frame is great in salt-water areas since it will not corrode.
Upgraded premium Ideal Draft Stopper pet doors also feature the Ultra Flex flap. However, it is an upgraded model that has eight additional magnets around the flap edges to ensure the best seal possible for your dog door. It will remain closed with winds of up to 35 miles per hour. Ideal Draft Stopper dog doors come with an aluminum frame.