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United’s heavy weight flame resistant base layer.

  • Flat seam construction eliminates chafing from gear

  • Microban® antimicrobial protection resists odors

  • Wicks moisture for comfort & dries fast

  • Made in the U.S.A. - Berry Compliant



Available Colors

USAF No Melt No Drip Next-to-Skin Approved Product


Fortiflame™ Layer IV fabric is a fleece blend of modacrylic/rayon yarns at 8.0 oz./sq. yard. The fabric is inherently flame resistant and has “0” after flame or melt/drip during test method ASTM D 6413-11. The garment has a smooth outer layer for ease of layering and is fleeced against the skin for comfort. It will provide maximum protection in extreme environments, while meeting stringent flame resistant standards. Fortiflame™ Layer IV fabric will keep the wearer dry from excessive moisture and is treated with Microban® antimicrobial to resist odors.

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