Now in a smaller, carry-on friendly size, the mia mily luggage bag universally configures into a ride-on suitcase for children or a portable seat for adults, allowing your child to quickly and conveniently travel with you atop the suitcase or providing a resting place for adults when standing for long periods. When travelling without a child, the seat on this spinner suitcase can be used to safely store a diaper bag, travel bag or a briefcase.  Suitable for ages 2+ who can sit unassisted; it can carry adults up to ~220lbs (100 kg) and easily fits in most airlines' overhead carry-on bins. Please check with your specific flight for overhead dimensions. Ages 2 - 99 years old Interior: 100% polyester, ykk zippers Spot clean only Dimensions: 15.5 x 11.5 x 18 in / ~39 x 29 x 50 cm (lx wx h) Volume: 43 liters Features: Built-in seat back  Bag hook TSA 3-digit lock 360-degree wheels Child safety belt Patented design 5-year product warranty.