Boys Ben 10 Pajamas. Make sure your little hero is kitted out ready for mission bedtime with these awesome pajamas. Featuring a large print of Ben Tennyson and his Omnitrix on the front, complete with an eye catching motif of Alien form silhouettes on the sleeves and bottoms in different colour greens. A perfect set of pjs that they can relax with extra comfort after a long day using his Omnitrix powers to fight evil from Earth and Space. It's Hero Time!