My four-year-old boy loves Ben Ten, so this costume was an obvious choice.  (The Ben Tennyson costumes were too ordinary to impress my son.)  The garment is one piece and is not scratchy.  Because my son is quite small, I had to pin various parts of the costume, but that did not affect its appearance or the fun factor for my boy.  The material is light-weight.

The mask is a standard plastic mask with a rubber band going around the heaed to keep it in place.  The eye openings are smaller than I would like for trick-or-treating.

Overall, this costume is an inexpensive and fun Halloween costume for a fan of Ben Ten.