Make your space-themed party out of this world with our Balloonify Mylar Astronaut Balloon. This astronaut foil balloon is crafted from durable mylar that ensures it maintains its unique shape throughout your event. Featuring a self-sealing valve, this mylar spaceman balloon can be filled with either air or helium by use of a pump. Ideal for all occasions, this moistureproof space party balloon transforms any gathering into a cosmic adventure. Reusable, this space-themed birthday balloon is not only a fun decoration but also a memorable choice for your celebrations. To reuse this balloon, gently deflate, properly store, and carefully reinflate without overfilling. Measuring 30.25 inches in length by 23 inches in width, this space birthday balloon has a striking presence that cannot be ignored. 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 avoid the risk of over-inflation. Electric air balloon pump (SKU: RWP1061) sold separately.