.Unlike the traditional 50 / 50 split in most luggage, the Deep Space™ System is designed with an increased back panel depth for easy and convenient packing .Made from 100% pure Polycarbonate, the most durable, flexible and lightweight material we have ever used in our luggage .Modern and sleek shape was designed to withstand heavy impacts .Built-in TSA lock .Zipper-released expansion system allows for an extra 20% in packing capacity .Fully-lined satin interior comes with buckled compression strap and built-in divider with large mesh pocket .Gel cushioned top and side handles .Patent Pending