AIRLINE APPROVED: Designed to fit under the front cabin seat in major airline carriers (please check your airline rules and regulations before flying). The adjustable shoulder strap and handle allows you to secure the carrier to your suitcase for easy mobility while traveling. The expandable space allows your pet to lay down and relax during the car ride and under the airplane seat. IDEAL FOR STRESS-FREE PET TRANSPORT: Take the weight off your shoulders with this carrier on wheels! Fully retractable premium material handle & 360 degree rotating and removable wheels ensure smooth, quiet, and effortless rolling mobility in any direction resulting in a bump free ride for your pet. Easy mechanism to attach and detach bag from wheel platform allowing bag to be used as a regular double sided expandable carrier! TWO SIDED EXPANSION: Both sidewalls expand into a roomy extension, giving your pet room to turn around and sprawl out. The mesh lining also gives them a chance to see your face, keeping them calm and happy. This is especially helpful for older pets and pets with joint problems. BREATHABLE: Expertly crafted roof ventilation design and mesh sides allows for continuous air circulation, keeping your pet from overheating and providing fresh supply of oxygen and fresh air at all times. SUPERIOR QUALITY: This masterfully crafted airline pet carrier tote is made from high quality, safe, and durable materials. Unlike other expandable carriers which clearly sag when expanded, we have added a thick wire frame at the top for extra stability, eliminating sagging corners. Our heavy duty retractable handle is durable and break resistant! FEATURES: Removable plush faux fleece bedding, padded shoulder strap and extra storage compartments. The pristine grade nylon material is lightweight, durable and sturdy, ensuring no-hassle reliance day after day, use after use, air mile after air mile. Dimensions: 18 inches (L) x 11 inches (W) x 11 inches (H). For pets up to 25lbs. Included components: Carrier, Shoulder Strap, Trolley, Wheels Product Features: ► EXPANDABLE FROM BOTH SIDES- Simply unzip the 2 walls of the carrier to make a roomy extension, giving your pet room to turn around, sprawl out, and even invite friends over. The mesh lining also gives them a chance to see your face, keeping them calm and happy ► STURDY & DURABLE DESIGN- Wire frame in both sides support the carrier to be more sturdy and prevent the sides from caving in like other soft-sided carriers. Two zipper doors are easy to access. Side-pockets can store small goods. Strap on the carrier allows you to easily hook the carrier on top of your luggage for travel. ► GOOD AIR CIRCULATION- Mesh front and back allows air to circulate more freely, keeping your pet from overheating and providing a fresh supply of oxygen. ► AIRLINE FRIENDLY- Please check airline regulations before flying. Our carrier easily slides under airplane seats (when wheels are removed) while the expandable space function allows your pet to lay down and relax during your car ride or airplane travels The expandable space function allows your pet to lay down and relax during your car ride or airplane travels To assemble: Unfold the fabric pet carrier and lift the sides to assemble. Zip the zippers and the carrier should stand upright. Lift trolley handle up so that it remains upright. Un-velcro the material flaps at the underside of the pet carrier and fold the flaps over the outer bars of the trolley and re-attach the velcro the secure the pet carrier to the trolley. Make sure to unbuckle the buckle at the back of the carrier, wrap in around the bars of the trolley, and re-buckle it to ensure the carrier is secured to the trolley.