Lightweight helmet prototypes shown at Pentagon Representatives of the U.S. Army Natick Soldier Research, Development and Engineering Center, Natick, Massachusetts, displayed an array of combat helmets at the Pentagon, May 24-25, 2018. This helmet, a NSRDEC prototype, provides equal protection to earlier helmets, but at less weight. Army photo by C. Todd Lopez SHARE: Download: Full Size (0.04 MB) Credit: C. Todd Lopez VIRIN: 180605-A-YG824-001.JPG Photo Gallery