>>332470690
Excuse me while I shiss this thing I've been testing.
These fans definitely work. There are vents on the uper inside of the frunk. These fans blow outward cause air to flow in around your face as is passes through the headset. Feels light you got AC inside. The second benefit is may top reason for using this. If you don't wear glasses and wear the Index fitted correctly for maximum FoV it causes the lenses to accumulate vapor coming off your eyes. Was never an issue with CV1 or Rift-S but on the Index I had to clean them almost daily. By maintaining circulation I never have to. 

I haven't had this Kiwi one for long but so far I think it's better than Chilldex(still out of stock). The chilldex had shitty fans the have progressively gotten louder over time dispite costing almost 50% more. Maybe version 2 will fix that. Also the button was difficult to get to.