Our DRIFIRE FR Control is built to tackle both hot and cold temperatures. This flame resistant base layer offers the most advanced fabric technology allowing it to actively respond to varying conditions and assist in regulating to your body temperature., DRIFIRE FR Control provides comfortable FR clothing by proactively regulating skin temperature by +/- 3 degrees, keeping your skin warm in cold weather and keeping it cool in warmer conditions. The moisture wicking technology and excellent drying rate help to reduce perspiration by 34%. The comfort level of FR base layer clothing can make a big difference in safety and productivity. The moisture wicking and temperature control of DRIFIRE FR Control helps to reduce heat stress while allowing you to maintain flexibility and range of motion. FR 3M Scotchlite Reflective Comfort Trim increases breathability and comfort.