Nooj,
Both! They have a small chrome button to deflate when you/ambulance peeps wanna get it off....
Anyway....

Hey NiteW4tcher,

Quality gear, picked up a catalogue a couple of years back from the NEC, was there for ages chatting to the sales guy.
He took great pleasure in bending the visor completely back on itself while I cringed in front of him waiting for it to snap – he said they’re made of the same stuff used for cockpits on F16s or something or other.
Big in America, can't believe it's taken so long to get going over here, nice to see someone else has heard of them

I was looking at the EXO-1000 tbh, it has all the bells and whistles and some of the other models you can actually customise the designs of the inserts ‘n stuff.
I don't buy rubbish and I've still got my eye on them 2 years later and it’s def on my shopping list when me OGK expires.
Good luck with it, let us know how you get on now won't you Chief Guineapig


Rob