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Base Layer and Thermal Underwear

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Flame Resistant Base Layer Apparel and Thermal Underwear

Flame resistant underwear and FR base layer clothing provide a last line of defense against electric arc flash and flash fire hazards. Many people have been saved by wearing FR base layer apparel from fires that burned through their outer protective garments. There are two types of FR fabric available for base layer clothing – inherently FR and treated FR. Fabric that is inherently FR, like Nomex, is flame-resistant for life, which means that no matter how many times it is laundered or how long it is worn, the material will always remain flame-resistant. Treated FR fabrics have a flame resistant chemical applied to them that makes the fabric flame resistant; however, normal wear, laundering, abrasion, and UV exposure gradually reduces the protective value of the garment over time.

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  • Drifire DF4-505TSW Women
    D6001029-2
    from $57.00
    $60.00
    from $57.00
    Sold out
  • Drifire DF2-MIL-762-PLP Prime FR Mid-Weight Soft Compression Long Johns
    D304486-3
    from $99.00
    $110.00
    from $99.00
    Sold out
  • Drifire DF2-MIL-762-PLS Prime FR Mid-Weight Soft Compression Long Sleeve Tee Shirt
    D304487-2
    from $93.60
    $104.00
    from $93.60
    Sold out
  • Drifire DF2-MIL-762-PBB Prime FR Mid-Weight Soft Compression Boxer Brief
    D304485-3
    from $74.10
    $78.00
    from $74.10
    Sold out
  • Drifire DF2-762-SB Women
    D304496
    from $64.60
    $68.00
    from $64.60
    Sold out
  • Drifire DF2-245LS Flame Resistant Heavyweight Base Layer Long Sleeve Shirt
    D3011016
    from $102.60
    $114.00
    from $102.60
    Sold out
  • Drifire DF2-762HNG Flame Resistant Hot Weather Neck Gaiter
    D3011011
    $27.55
    $29.00
    $27.55
    Sold out
  • Drifire DF2-762CNG Flame Resistant Cold Weather Neck Gaiter
    D3011010
    $47.50
    $50.00
    $47.50
    Sold out
  • Drifire DF2-245LP Flame Resistant Heavyweight Long John Style Pant
    D3011017-2
    from $96.90
    $102.00
    from $96.90
    Sold out
  • Drifire DF2-762CB Flame Resistant Heavyweight Cold Weather Balaclava
    D3011027
    $59.85
    $63.00
    $59.85
    Sold out
  • Drifire DF4-505LS Flame Resistant Ultra Lightweight Long Sleeve Tee Shirt
    D3011020
    from $68.40
    $72.00
    from $68.40
    Sold out
  • Drifire DF4-505LP Flame Resistant Ultra-Lightweight Long John Style Pants
    D3011021-2
    from $73.15
    $77.00
    from $73.15
    Sold out
  • Drifire DF4-505TS Flame Resistant Ultra Lightweight Short Sleeve Tee
    D3011019-2
    from $57.00
    $60.00
    from $57.00
    Sold out
  • Drifire DF2-762HB Flame Resistant Hot Weather Balaclava
    D3011015
    $38.95
    $41.00
    $38.95
    Sold out
  • Drifire DF4-505BB Ultra-Lightweight Flame Resistant Boxer Briefs
    D3011022
    from $55.10
    $58.00
    from $55.10
    Sold out