Its ok.
In the Halo Universe, he Elites, which is what the costume is, are the military leaders of the covenant, which is a combination of a bunch of other aliens who just enjoy being dicks to humans. They all use a heat based weapon called plasma. They use space to ground to attacks to heat the ground up so hot, it turns to glass.

I combined this with another mean "I will rape/burn everything you love.

I know, I play Halo, I just didn't know about the glass part. Thanks anyway for all the other info.

so does it ever explain how those helmets stay on their heads?
I dont see a strap or any thing just looks like its chillin on top of its head

It is form fitting.

okay thank you this was one of the great questions of life

i think its built in.

******* hell man lol here take a thumb you deserve it.

Thanks, sorry for the white-not-on-black-text, I just made it in paint.