This versatile, 3-in-1 carrier can be worn as a small pet backpack, used as a pet front pack (chest carrier), or paired with an optional trolley to become an airline-approved pet carrier with wheels. The lightweight aluminum frame offers unparalleled durability, while the 90-degree wide opening ensures easy access to your pet. With breathable mesh windows and an ergonomic design, this TSA approved pet carrier is perfect for keeping your pet safe and comfortable on the go. - The best airline-approved pet travel carrier with wheels. - Lightweight, waterproof, scratch and stain-resistant. - The trolley is sold separately and not included with the carrier. - Panoramic 90-Degree Extra Wide Opening: - Quick Closure, Zipper-Free, and pamper windows - Lightweight alum fram, waterproof, stain-resistant, and wear-resistant polyester fabric. - Auto-Locking Zipper and safety tether - 3-in-1 Multifunctional Small Pet Carrier for land, air, and sea travel