- Size and fit: Pet Bag measures 18.9 L x 9.8 W x 11 H, suitable for small to medium pets up to 11 lbs. Do not choose harness size based on weight alone; also consider your pet’s length and height when selecting a harness. - Comfort and ventilation: The four-sided mesh window uses a 3D sandwich mesh to balance privacy and airflow, helping keep shy pets calm while promoting good air permeability. A soft cushion is included and can be spread flat for use. - Portability and versatility: Easy to carry with handles and an adjustable shoulder strap. The bag can be attached to a car seat or luggage for convenience. Please contact your airline to confirm carry-on size rules before flying. - Storage and care: Collapsible design for compact storage when not in use. The interior mat is removable and can be machine washed or hand washed for easy cleaning. - Use scenarios: 1) Vet visits or short trips where your pet needs a contained, comfortable space. 2) Air travel as a carry-on (verify airline carry-on requirements before departure). 3) Car trips or hotel stays, using the bag secured to a car seat or luggage to simplify travel.