- last post: 01.01.0001 12:00 AM PDT
Well, if you read Fall of Reach,the Spartans, before mjolnir, wear a suit with a helmet and armour that was described very similiar to what the ODSTs wear. I think that, like other people have mentioned, ODST armour is much older than Mjolnir, so Mjolnir would be modeled after it.
Besides, if you get launched out of a spaceship feet-first towards the unyielding ground, wouldn't you want a cool looking helmet, too?