“The Army started issuing a female version of the Improved Outer Tactical Vest in Afghanistan in 2012. The vest is darted, to fit a woman’s torso more snugly. It’s also shorter, so women can sit without having the thing ride up into their chins. It even has a collar designed so it won’t snag on a hair bun. Similarly, the Marine Corps’ Plate Carrier (a vest that holds armor plates) is shorter, with narrower straps. Still, this is about much more than making everything smaller. Another critical class of gear protects the pelvis. The Army developed seven sizes of its female-specific Protective Under Garmets to better fit a woman’s hips. Also, no fly. Another critical class of gear protects the pelvis.”
http://www.wired.com/2015/12/women-combat-roles-gear/