The Ideal Pet Products Ruff-Weather Pet Door with Telescoping Frame in Medium size is designed specifically for medium-sized dogs. Made of durable vinyl material, this pet door features a telescoping frame that helps to keep out cold air and noise while allowing your pet to come and go as needed. With the trusted Ideal Pet Products brand and innovative design, you can feel confident that your furry friend will stay safe and comfortable.if you have any questions just send us an email. Thanks for looking!