Polymer Materials: The material of the laptop rolling bag is made of 420D embossed Oxford cloth PVC base, which is highly stable. It is made of durable frames and high-quality waterproof fabric. With a compact combination lock, it enhances security(Note: The bag can accommodate up to 15.6-inch/17.3-inch ultra-thin laptops. ) Removable Swivel Wheels: This rolling briefcase with wheels is equipped with 4 detachable wheels, a telescopic handle, and a sturdy handle, allowing you to choose between pulling and rolling or carrying by hand during travel/business trips, and switch according to the environment at any time Aircraft-certified Size: The dimensions of this rolling laptop bag are 17.3" x 15.7" x 8.3", suitable for most airlines' overhead compartments and meet the size requirements for carry-on luggage. It is compatible with under-seat storage. The rolling computer bags is an ideal choice for business men and women traveling on business trips Removable laptop Sleeve: The spacious main compartment can accommodate overnight clothes, documents, and other daily essentials, and comes with a removable 16.5-inch padded laptop sleeve for convenience during airport security checks.