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.