STROLLER/TRAILER: Two-in-one 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 pet stroller keeps in shape for safety. Fabric cover shields against the outside, keeps them enclosed. SAFE: Four wheels for a smooth ride. Inner leash to keep them safely attached inside. DIMENSIONS: Trailer: 108H x 134L x 73Wcm. Stroller: 108H x 103L x 73cm.