The Comfort Wagon, with its captivating Italian design, suspension, multiple uses, and a marked emphasis on safety, will open up a whole new world of activities for you and your special friend. Features: -Includes bike towing bar and bike connection. -Made with a heavy duty aluminum frame. -Zippered doors on four sides for easy access to your pet. -Claw proof mesh windows for great ventilation. -Sunroof can be opened, rolled, and stowed. -Optional wagon stroller kit allows you to convert wagon into pet stroller. -Folds up for easy storage. -For pets up to 165 lbs. Sizes: -Medium: 22″ H x 18″ W x 34″ D. -Large: 24″ H x 26″ W x 35″ D.