I recently came across these photos showing what appears to be a Urban/gray version of m81s worn by a few Airmen during Guardian Challenge in 2001 and was wondering if anyone has any information about them or actually has a pair in their collection. It's something I've been curious about for awhile and finding more pictures recently has rekindled my intrigue in them.
![Experimental Urban Camo seen at Guardian Challenge 2001 VEZXWQu](https://i.imgur.com/VEZXWQu.jpg)
![Experimental Urban Camo seen at Guardian Challenge 2001 2DvJPpZ](https://i.imgur.com/2DvJPpZ.jpg)
![Experimental Urban Camo seen at Guardian Challenge 2001 G3m2nA3](https://i.imgur.com/G3m2nA3.jpg)
![Experimental Urban Camo seen at Guardian Challenge 2001 VEZXWQu](https://i.imgur.com/VEZXWQu.jpg)
![Experimental Urban Camo seen at Guardian Challenge 2001 2DvJPpZ](https://i.imgur.com/2DvJPpZ.jpg)
![Experimental Urban Camo seen at Guardian Challenge 2001 G3m2nA3](https://i.imgur.com/G3m2nA3.jpg)