Don't be shocked if you see pics of SEAL, SWCC and or the new Maritime units in Iraq (non-SWCC Riverine forces) using these as well - I've got reports from the sandbox saying that's the case...
It all boils down to the fact that the "new" uniforms (MARPAT / ACU) were not originally designed to be a fire reistant as needed. The flightsuits are a stopgap "field expediant" measure until stuff like the new FROG II gear shown above can make their way to troops on the front lines...
__________________
|