1. Material of inflatable combo should be natural rubber or mixture synthetic rubber, these material is suitable for inflatable combo, what is more, inflatable combo manufacturer should provide material certification.

2. Inflatable combo products must be tested, and provide the test report. The test need to follow the national special equipment and rules. Inflatable combo maximum using life should be based on test data to determine.

3. Inflatable combo must be equipped with two insurance rope, the straightening length should be longer than the inflatable combo effective stretch. For high bungee jumping two insurance rope should be straightened to ensure that jumpers from the collocation point not less than 3m. Two safety rope of the static load safety factor should be not less than 10, small combo can be used without two insurance rope.