This carrier is to large to fit under airline seats. Not airline approved for in flight travel or cargo. roll down flaps for privacy inside D ring that can be attached to pets lead * Removable machine washable liner. * X-Large - 24" x 13" x 13" (pets up to 35 lbs) * Mesh panels for ventilation. Measure your pet before ordering * Locking zipper to prevent accidental escape top. Also includes top and side entry