T-Rex Inflatable Costume • 100% Nylon • Imported • Zipper closure • Spot Clean as Needed • LONG SLEEVE inflatable jumpsuit with zipper closure on the back and battery-operated fan • Fan requires 4, AA batteries (not included); do not use rechargeable, nickel-cadmium; remove batteries from fan while not in use From Rubies, manufacturer of the Original Inflatable Dinosaur costume My son wore this once when he was 7, an average size kid. This costume was only made in one size at the time. Today, I put a rubber band around the arms and legs to keep all the air inside. I inflated it to be sure it held air, and it did. I left it inflated for an hour and it was still holding the air. When I deflated it, I noticed a tiny hole in the seam close to the fan, it was about 1/8th of an inch, and even with the tiny hole it held air. I put 3 stitches to close the hole to be on the safe side. Please see picture. I