![Inflatable Mattress Blow Up Bed](https://images-na.ssl-images-amazon.com/images/G/01/x-locale/common/grey-pixel.gif)
Step 1: Open the airtight valve, inflate the mattress to 90% full , then close the first plug quickly.
Step 2: Find the second airtight valve, add air to 100% full without any folds, and close the second airtight plug tightly.
Step 3-4: Press the valve horizontally to enter the inside of the air bed, so that the air-tight valve will not protrude outside the air bed so that the air can be better retained, NO Leak.