Decorate your blue-themed party using our Balloonify Blue Mylar Number 2 Balloon. Shaped as "2," use this mylar balloon with other Balloonify numbers and letters to style it your way. Made from premium mylar, this party balloon doesn't pop easily in heat. Plus, this balloon decoration is moistureproof to withstand humid conditions. To maintain its shape, this foil balloon has a self-sealing valve, avoiding any air leakage. Inflate this happy anniversary balloon with air or helium using any type of pump. The blue finish of this number balloon lets you create marvelous decor for your gender-reveal party. This reusable birthday balloon measures 40 inches when inflated with air or helium. To reuse this balloon, gently deflate, properly store, and carefully reinflate without overfilling. Shipped deflated in a 1 count box. This party balloon can be easily inflated with the included straw, providing you with full control to help eliminate the risk of over-inflation. Electric air balloon pump (SKU: RWP1061) is available and sold separately.