This new (never used, without tags) expandable under-seat carry-on is an extremely versatile bag that starts off as a small easy-to-store pouch, and opens to become a 4-wheeled carry-on that slides comfortably under the airplane seat in front of you. Need more space? No problem! Your under-seater expands a full 5" upwards, to become a full sized TSA approved carry-on! Durable and water resistant nylon fabric Rear trolley sleeve, allows you to slide the bag over the trolley handle of a suitcase 4 multi-directional spinner wheels 3 exterior zippered pockets, and two interior mesh zippered pockets The carry-on can be wheeled or carried using its adjustable cushioned shoulder strap. Dims: 16"x15"x9", Expands to 21"x15"x9" Dims Folded: 15"x9"x4" Weight: 3.85 lbs Volume: 30 liters not expanded, 42 liters expanded. Materials: Exterior fabric: Crinkle Nylon, water and tear resistant Zippers: Nylon Care Instructions: Wipe clean with damp cloth.