GENEROUS SPACE: Accommodates medium- and large-sized dog breeds up to 12 kg (26.5 lbs) with dimensions of 38cm long, 39cm wide, and 55cm high. TAILORED COMFORT: The adjustable module of this dog backpack allows personalized back length adjustment, ensuring the backpack's weight is evenly distributed over the waist, shoulders, and chest for optimal balance. Padded back and hip belts with breathable sponge offer maximum comfort and prevent overheating. EASY PET ACCESS: The full U-shaped large opening lets pets pop their heads out comfortably, reinforced with sturdy edges to prevent collapsing or deformation. VERSATILE WITH WHEELS: Purchase the detachable trolley platform separately to convert the backpack into a convenient dog suitcase with wheels. CAR BOOSTER OPTION: Transform this versatile dog backpack into a dog car seat booster by threading seat belts through the provided loops, adding practicality for pet transportation in your car. Discover Ibiyaya’s Champion Medium Dog Carrier Backpack, the perfect companion for all your pet adventures! This versatile backpack can be used in multiple ways, serving as a large dog backpack with windows, a dog carrier backpack with wheels (or dog suitcase), and a dog car seat booster, making it a must-have for long travels and exciting hikes. What sets this product apart is its unique multi-stage back length adjustment system, inspired by professional mountain climbing gear. Say goodbye to discomfort and ensure a secure fit for you and your furry friend. The spacious interior provides ideal weight balance, ensuring maximum comfort during your journeys. With its ergonomic design, the Champion Medium Carrier Backpack can carry medium-sized pets up to 12kg or 26.5 lbs, making it a breeze to take your furry companion on all your adventures. For even more convenience, you have the option to enhance the backpack's functionality by purchasing the dog backpack trolley separately. Embrace the freedom of exploring the world together with your beloved pet using our top-notch Champion Medium Dog Carrier Backpack!