U.S. Air Force Airman 1st Class Tiffany Eustice, a 35th Civil Engineer Squadron emergency manager, puts on the cooling vest at Misawa Air Base, Japan, Nov. 12, 2020. Airmen are potentially exposed to high heat-stress environments and the vest allows for constant cooling of the Airmen’s core temperatures ensuring Airmen can safely execute the mission. (U.S. Air Force photo by Airman 1st Class China M. Shock)