Underwraps brings you the most adorable Light Up Alien UFO Belly Babies costume for Halloween, parties, dress-up and even fun photo shoots. UFO Light up feature is ideal for enhanced safety visability during dark trick or treat hours. Light Up Pack requires 2 AA Batteies not included with this package.SOFT AND CONVENIENT: Soft swirl design plush body, with velcro closures. Complete your look with the adorable detailed plush hood. Easy to pull up for effortless diaper changing. Leggings are not included.COMFORTABLE: Made from a lightweight baby blanket material with cooling fiberfill to keep your Belly-Baby happy and comfortable. Designed to be spacious enough to pull over warm clothes during cold weather if necessary.SIZING: Available in Toddler’s Medium (18-24 months), Large (2-4T), XL (4-6).