A smart collection inside and out! All bags feature dual-density spinner wheels for superior mobility and a built-in TSA-accepted lock for optimal security. The interior lining is removable and washable so you can keep the inside of your bag fresh for your next getaway. Plus the carry-on is equipped with a USB port and a power bank sleeve to power up devices on the go (power bank not included) while the medium and large sizes feature Delsey?s patented overweight indicator so you know if your luggage weighs more than 50 lbs.