Special Forces jump wings HELP

[Sleeping Sun]

I've seen several pictures like the two below where the Special Forces soldiers have those colored pieces of cloth under the jump wings. What the hell are those pieces of cloth? Do they indicate the Special Forces Group where they serve or what...?

http://www4.army.mil/OCPA/uploads/medium/SILVERSTAR02.jpg
http://www4.army.mil/OCPA/uploads/medium/SILVERSTAR01.jpg

[ibstolidude]

Airborne Background Trimming
It is authorized for units designated airborne or air assualt.

It is colored/designed/representative based upon organisation.

The first soldier's represents the 3rd SFG, tje second appears to be 7th SFG.

[Sleeping Sun]

Thanks!