How to inflate it? Place an air pump or a straw in the air inlet. Make sure it is the air inlet to avoid damaging the balloon. Inflate slowly up to 90% and then seal the inflation inlet. How to deflate it? Insert a straw of more than 10 cm into the inflation hole and gently press the palm of your hand on the balloon to expel the gas. Our balloons are made of premium durable and reusable material. They are easy to inflate and deflate. Perfect for decorating parties of any age and theme. Balloons are shipped deflated and a straw is included to inflate them with air. Start inflating with helium 1-2 hours before the party. If you have any problems with the balloons, do not hesitate to contact us and we will provide you with excellent after-sales service.