In hot or cold climates, this door saves energy while giving your pal his freedom. If you live in a location with an extreme climate you'll love this door. Our 3-flap pet door keeps extreme hot and cold out of your home while giving your pet the freedom to come and go. This well-designed door has a maximum energy efficiency that's 3.5 times higher than our standard single-flap pet doors.
3-flap system offers protection from extreme heat, cold, draft, insects, and driving rain
Snap-on weather cover for added insulation
Durable plastic frame construction
Fits doors 1 1/2" to 2" thick
Small is for pets up to 15 lbs; Medium is for pets up to 40 lbs; Large is for pets up to 100 lbs; Extra-Large is for pets up to 220 lbs