When 10 year old Ben Tennyson acquired an alien watch-like device, he attached it to his wrist and it allowed him to turn into 10 alien creatures... This officially licensed, three piece costume, features a jacket style top with integrated black t-shirt, printed '10' logo to front and velcro fastening to back. A pair of blue trousers with elasticated waist along with a foam, alien, watch-like device with velcro fastening strap, use the powers of the Omnitrix just like Ben and create your own action adventure....