An official website of the United States Government 
Here's how you know

Official websites use .gov

A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS

A lock ( lock ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Photos

Snapshots of what’s happening in the Defense Department.

Tom Endrusick, Research Physical Scientist, wipes the sweat from one of two life-sized mannikins, capable of mimicking walking and sweating, at the U.S. Army Research Institute of Environmental Medicine, Natick, Mass. The mannikins are used to test the thermal and vapor-resistance values of uniforms.

Tom Endrusick, Research Physical Scientist, wipes the sweat from one of two life-sized mannikins, capable of mimicking walking and sweating, at the U.S. Army Research Institute of Environmental Medicine, Natick, Mass. The mannikins are used to test the thermal and vapor-resistance values of uniforms.

Tom Endrusick, Research Physical Scientist, wipes the sweat from one of two life-sized mannikins, capable of mimicking walking and sweating, at the U.S. Army Research Institute of Environmental Medicine, Natick, Mass. The mannikins are used to test the thermal and vapor-resistance values of uniforms.

Photo Gallery