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Generation III Extended Cold Weather Clothing System ECWCS levels 7 (left) and 5 (right). The Extended Cold Weather Clothing System (ECWCS / ˈ ɛ k w æ k s /) is a protective clothing system developed in the 1980s by the United States Army Natick Soldier Research, Development and Engineering Center, Natick, Massachusetts.
A vacuum is the best insulator, but its use in clothing is impractical. Dry air is a practical insulator. Extreme cold weather clothing uses still dry air to insulate the body, [2] layers of loose air trapping material are most effective. The inner layers should conduct moisture away from the body.
Extreme cold – From −25 to −40 °F (−32 to −40 °C). In extreme cold the challenge of survival becomes paramount as personnel withdraw into themselves. Weapons, vehicles and munitions are likely to fail in this environment. Hazardous cold – From −40 °F (−40 °C) and below. Units require extensive training before operating in ...
Emphasis is placed on the effects of cold on personnel and material, recognition, treatment and prevention of cold weather injuries, use of basic cold weather clothing and equipment, winter field-craft, use of cold weather shelters, use of Army approved heaters, and over snow movement techniques.
The patrol bag provides weather protection from 35–50 °F (2–10 °C). The intermediate bag provides cold weather protection from −5–35 °F (−21–2 °C). Combining the patrol bag and intermediate bags provides extreme cold weather protection in temperatures as low as −30 °F (−34 °C).
Depending on your health condition, Tomazic says you may want to wear a face mask to help warm the air you're breathing in. A face mask is also a good way to keep the wind off your face.