【CHECK SIZE BEFORE BUYING】In order to fit the under-seat dimensions of airlines, this carrier can only fit small dogs and cats. We recommend that the pet size you carry be within 14"L x 8"W x 10"H(this carrer's inner size), please choose the carrier reference your pet's length and height. Reference pet weight: dog weight under 10LBS and cat weight under 12LBS. 【AIRLINE APPROVED CARRIER 】Unfolded size:17"L×11"W×(9.5+3.5)"H, Petskd pet carrier is TSA approved and can be placed under the seat in the cabin(after remove the wheel base), it is mainly designed for ①Alaska Airlines, but also in compliance with ②Southwest Airlines③Delta Airlines④United Airline⑤American airlines⑥Air Canada. We recommend you buy this carrier when you fly with the above-mentioned airlines. 【SMOOTH AS PULLING A SUITCASE】Take the weight off your shoulders with this carrier on wheels! The carrier has 4 high-quality wheels with 360° rotation can ensure a smooth and comfortable riding experience for rolling cat carrier on uneven road surfaces or grass. The handle of rolling pet carrier is designed like a suitcase, the wheels and the wheel base are removable from the carrier so you can not only use it like a suitcase, but also as a shoulder bag or a handbag. 【BETTER VENTILATION】Petskd pet carrier has mesh ventilation on 5 sides for good ventilation and good viewing—perfect for your pet to look out and for you to check on your pet;the Dog carrier has 3 openings, and each opening has two non-slip zippers to ensure pet safety. 【SAFE DESIGN】Soft dog travel carrier bag upgraded structural design of stainless steel and Fiber rod that makes our dog carrier bags for small dogs will not be out of shape or sagged and the top does not collapse, pet dog carrier bag preferable stability. Built-in adjustable rope buckle, easy to lock the collar. Zipped snap lock to avoid pets to open or grab open the zipper. 【DURABLE MATERIAL】Made of waterproof, non-toxic, scratch-resistant polyester fabric material, waterproof and wear-resistant; after comparing similar products, we upgraded the mesh material to effectively prevent pets from tearing the mesh with their nails and prevent pets from falling out of the carrier. 【QUALITY GUARANTEE】: Petskd offers a 12 months warranty service, Quality problems within 12 months can be replaced for free on new models. So if you have any problems with your product, please feel free to contact us and we will get back to you as soon as possible within 24 hours. top expandable airline approved pet carrier with Wheels