Now in a smaller, carry-on friendly size, the MiaMily 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 of time. When traveling 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 bin. 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 (LxWxH) 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.