Pottery Barn Kids Light-Up T-Rex Halloween Costume Size 3T Dino dreams come true! They'll light up the night in prehistoric style with the Light-Up T-Rex Costume that's bound to be a dress-up tavorite. It boasts battery-operated LED lights in the spikes on the head for a playful twist to their favorite dinosaur design. It's crafted from a plush material with whimsical, colorful accents like embossed scales and shimmering foil fabric detail. Its plush material is soft to the touch Lights up on the horned tail and is battery-operated (batteries are included). Made of 100% polyester. Fabric on front belly is polyester blue printed foil. Costume is filled with polyester fibers and polyurethane foam. Velcro closure on back of jumpsuit and headpiece. 2-piece includes 1 headpiece and 1 jumper Headpiece: 20" wide x 12.5" high Neck: 5" wide Jumpsuit: 13.5" wide (chest) x 21" long (to inseam) Inseam: 12" long Sleeve Length: 18.5" Shoulder to Shoulder: 10" wide Halloween costume