The Air Cushion Cup from Tenga is a world first in male stimulation with the air-cushion mechanism. The clinging sensation that you will experience during use is achieved by allowing free changing of air pressure in the 24 air-cushion chambers.
The unique valves create a virtual vacuum within the cup which provides sensational sucking action.
You can adjust the vacuum to suit your needs by covering or uncovering the air hole. Once you've inserted fully cover the air hole with your finger and pull.