Make your loved ones feel special using our Balloonify Silver Mylar Letter S Balloon. Shaped as the letter "S," this helium balloon is compatible with other Balloonify numbers and letters. Manufactured from mylar material, this birthday balloon is durable and moistureproof. The self-sealing valve of this foil balloon closes automatically after the inflation process to avoid air leakage, retaining the shape and size of the balloon for a long float time. Conveniently hang this graduation balloon on walls or ceilings, as it comes with a built-in hanging loops. With a metallic silver finish, this helium-quality balloon is a visual treat for your guests. Measuring 16 inches when inflated, this reusable balloon decoration can be inflated using a hand pump. 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.