Apologies, I suppose a warmer variety is acceptable for use with thinning servicemen. In answer to your question there is no FOD threat unless you try to fly with your hat on - it' quite safe in an enclosed pocket! To avoid getting it mixed up with others how about writing your name in large letters in tippex? Oh and MTV is Music Television as seen on sky tv.
Rgds!
ps The tailor in Akrotiri makes them but they look pretty bad.