These huge balloons will be a hit at your party whether seen from far away as well as beautiful up close.These balloons make a wonderful backdrop. Fantastic for shoots and all other photo ops.This set photographs so well anywhere at your party. Can take pics with party guests, with the cake or anywhere else you want to show off You may fill it up with natural air and balloon does not float. Or fill it up with helium and balloon will float. In normally, helium only floats for 12-24 hours, so it’s better filled on the day of use. self sealing foil balloons up to 27% thicker than industry average, an extra-large seam, and a self-seal design. self sealing foil balloons up to 27% thicker than industry average, an extra-large seam, and a self-seal design. Premium Quality Foil Balloons: these balloons are made of quality aluminum foil, sturdy and durable, can be reused for many party occasions. How to use it: We have a straw for this balloon. You can find the inflatable port, insert the straw into the inflatable port, and then blow the air effortlessly, and the balloon will inflate. Once you've blown it to the point where you want it, gently pinch the end and it will automatically seal, no extra ribbon or hand knotting is required