I found a good article titled "Army Improves Aviation Clothing to Reduce Burn Injuries" by Debi Dawson of PEO Soldier the has a pretty good overview of the A2CU. For those of you that don't know the Army Aircrew Combat Uniform or A2CU is a two piece flight suit in the universal camouflage pattern that is more durable, more comfortable and less bulky than previous aviation uniforms. The A2CU is now being issued to deploying units. The A2CU can be worn with the Microclimate Cooling Vest, which reduces heat stress to helicopter crews, in hot weather Environments. For aviators and combat vehicle crews working in cold and wet climates, the Army is developing the Fire-Resistant Environmental Ensemble (FREE), a multi-layered clothing system that will be functional in a range of climates and activity levels. It is designed to increase comfort and efficiency in the confines of aircraft and armored vehicles. More information can about the A2CU, FREE and other clothing in development can be found here at PEO Soldier. 
   
                        

                        Photo from PEO Soldier