The Natick Army Soldier Systems Center, which does research and development on clothing, for the military, conducts studies and research to develop the most high performance gear for our US forces. The research & development gear is the long and hard work invested in the quest for the PERFECT uniform for our soldiers. These garments are a collectors dream! Unique and Never again duplicated! 7 Levels of the best researched and developed gear!!! All Fire Retardant with R & D Labels!!