DRIFIRE offers a two-piece flightsuit and combat shirt that are approved for use by NAVAIR. Designed to work together, these FR, performance garments are well suited to ground as well as air operations. I think LE organizations who face flame threats should check these out.
Like I said, these are performance FR garments. In addition to their FR properties, they are also anti-microbial and moisture wicking. As far as flight clothing go, the DRIFIRE garments fuse combat and flying features making them great options for Multi-seat aircraft such as cargo and rotary wing. Both garments are offered in Khaki as well as Sage.