The Sidewinder is a Lightweight Expandable Spinner luggage with loose TSA™ Locks. It is made from a Polycarbonate composite and utilizes a zipper closure system. Polycarbonate is the same material used in the making of Bullet-proof glass. It is both durable and flexible so that when under stress, it flexes to absorb an impact and then flexes back to its original shape. The Sidewinder utilizes Spinner wheels that are specially made in Japan. These wheels allow for such fluid motion, that it will seem the luggage is gliding on its own power.