Be party-ready anytime and anywhere using our Balloonify Blue Mylar Number 1 Balloon. This balloon decoration comes in the shape of the number "1" and can be combined with other Balloonify numbers and letters. Manufactured from premium mylar, this foil balloon won't pop easily due to heat and is moistureproof for a longer float life. Conveniently place this helium balloon on walls using the hanging loops to create unique decors. To maintain its shape and size, this mylar balloon comes with a self-sealing valve that makes it airtight. With a vibrant blue aluminum finish, this number balloon creates an electrifying outlook for your party. For a quick setup, this party balloon can be inflated with air or helium using pumps. This custom balloon measures 40 inches when inflated and is reusable for all parties. 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.