Light Weighted, Attractive, Colorful, And Easy To Carry This foil balloon is helium quality and suitable to inflate with both helium or air. This balloon is self sealing so no tying with fingers required. Can be repeated use, convenient inflation and deflation! Use a medium width drinking straw included with the product and insert it into the self-sealing valve of the balloon. Once you get to the end of the sealing valve you will here a puff of air escape. Then slowly push the air out of the balloon.