Sized for a smaller companion, this dog bike trailer carries a dog up to 18 inches tall, or a couple of smaller pets together, up to a 66-pound weight limit, inside a 30 x 21 x 20.8-inch compartment. The frame is powder-coated carbon steel paired with tear-resistant, waterproof, sunproof 600D Oxford fabric, so it stands up to sun and rain without breaking down. A front door with a zippered mesh layer and a PVC canvas panel lets you choose between an open breeze on nice days or a closed, weatherproof shield when it's wet outside. Both front and rear doors zip open for easy loading and unloading, and your dog can poke its head out through the mesh for fresh air along the way. Four reflectors and a high-visibility flag keep the trailer easy to spot in low light. The coupler connects to bikes with 22 to 28-inch wheels in just a few steps, and the whole unit folds down to 29.9 x 22 x 7.7 inches with removable wheels, weighing 25.57 pounds for manageable storage between rides.