Use
The pump with reduction is used to properly inflate the self-inflating foam mattress. Inflate so that the mattress is pleasantly soft, but so that you do not sideways roll it.
The pump with reduction will do you an even greater service when inflating. You can easily deflate the mattress to the minimum size for easy transport.
Connect
You connect to the air pump with a large diameter nozzle. You then attach the pump with reducer to the valve of the mattress.
Manufacturer of small size battery air pumps