This playful twist on a classic Halloween costume glows in the dark so it’s bound to be a dress-up favorite. With the body boasting a soft velour construction, it’s hat is knitted from super-soft fabric so your child can stay comfortable all day and night long. DETAILS: This fun costume is designed by our talented Pottery Barn Kids team who personally make the first sample and plan every special detail. Our costume is finished in garment-quality stitching and construction so it can be handed down to siblings and worn for years to come. Made of 100% polyester velour and reverses to polyester satin. Costume glows in the dark. Glow-in-the-dark material needs to “charge” under bright light for approximately half an hour to glow properly. Glow lasts for approximately three to four hours. The glow effect will become weaker over time with constant use. Costume is yarn-dyed – fibers are treated individually with environmentally safe dyes before weaving to offer vibrant, lasting colors. Undergarments and leggings are not included. Sizing from listing: Size 3T Headpiece: 11.5" wide x 14" high Neck: 5" wide Romper: 17" wide x 21" long Bottom Sweep Relaxed: 9.5" long Bottom Sweep Extended: 14.5" long