As found on io9

And they teach you how they made it too on Instructables!!

 It's not every day you have a girl going. - OMG. I WANT TO WEAR HALO SPARTAN ARMOR. Well that's what happened to netizen LilTyrant of the 405th Infantry Division, a Halo costumer forum.

What's SUPER AWESOME is she documented her entire process on her post and girls, if you wanna try this out for fun, by all means give it a go!

Check out her process from start to finish here