Give your best friend's birthday bash an extra dose of fun with our Balloonify Silver Mylar Letter X Balloon. To curate lovely messages, pair our X-shaped custom balloon with other Balloonify letter and number balloons. The moistureproof characteristic of this mylar balloon makes it strong even when exposed to humidity and heat. With a reusable design, this party balloon can be deflated to store it away once the party is over. To efficiently keep this metallic balloon in pristine condition, its self-sealing valve closes once it is inflated, avoiding any air leakage. As this graduation balloon is inflatable with a hand pump, setting up this balloon will be easy. The stealing silver shade of this letter balloon gives a premium look and feel. Designed with a built-in hanging loops, this birthday balloon is hangable to create balloon banners or arches. Measuring 16 inches in length, this foil balloon can be 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.