STROLLER/TRAILER: 2-in-1 design can be pushed, or attached to your bike to pull behind.FRONT AND BACK DOOR: Easy access of this dog trailer for bicycle. Two side windows so they can see outside.STEEL FRAME: Solid structure of this dog stroller keeps in shape for safety. Fabric cover shields against the outside, keeps them enclosed.SAFE: Four wheels of the dog bicycle trailer for a smooth ride. Inner leash to keep them safely attached inside.DIMENSIONS: Trailer: 108H x 140L x 72.5Wcm. Stroller: 108H x 103L x 73cm. Suitable for medium dogs less than 54 cm in length and less than 20 kg in weight.