Give your parties an intergalactic look with our Balloonify Mylar UFO Balloons. These unique UFO balloons are crafted from durable mylar, ensuring they will last throughout your event and beyond. Perfect for an alien-themed party, these alien party balloons will certainly be the talk of the town. With their self-sealing valve, inflating these flying saucer balloons is a breeze, keeping your event preparation easy. Plus, these moistureproof saucer balloons are suitable for air or helium, simply use a pump to inflate. Hang these balloons on the ceiling with their hanging loops to make them look as if they are flying. Reusable, these mylar balloons are an ideal choice for your party needs. To reuse these balloons, gently deflate, properly store, and carefully reinflate without overfilling. Measuring 24.75 inches in length by 20.75 inches in width, they're sure to make a bold statement at any event. Shipped deflated in a 100 count box. These party balloons can be easily inflated with the included straw, providing you with full control to help avoid the risk of over-inflation. Electric air balloon pump (SKU: RWP1061) sold separately.