There was a post on Ravelry knitting military supporters group by SerineKat. that says "Citizen Support for America’s Military (CSAM), Operation Helmetliner’s parent organization, has recently been informed by its military contacts for the helmet liners that the military has begun issuing its own helmet liners made of a special wicking material as its standard. They will no longer be allowed to accept the liners you have so lovingly made."
There's more to her post...
http://www.ravelry.com/discuss/knitt...s/1239995/1-25