Airmen from the 28th Civil Engineer Squadron Fire Protection Flight don Mustang Ice Commander suits before heading out on the ice at Canyon Lake in Rapid City, S.D., Feb. 12, 2019. The suits are made of durable urethane-coated nylon shelland a removable buoyancy liner, which provides additional thermal protection. (U.S. Air Force photo by Senior Airman Michella Stowers)