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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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  • UJF A11B300 Fortiflame Baselayer Level 1 Flame Resistant Boxer Shorts with Fly
    U304564-01
    $43.17
    $57.55
    $43.17
    Sold out
  • UJF A11B100 Fortiflame Baselayer Level 1 Flame Resistant Short Sleeve Crew Shirt
    U304563-01
    $43.17
    $57.55
    $43.17
    Sold out
  • UJF A11B200 Fortiflame Layer I Flame Resistant Long Pants with Fly
    U304562-01
    $47.78
    $63.71
    $47.78
    Sold out
  • UJF A11B101 Fortiflame Baselayer Level 1 Flame Resistant Long Sleeve Crew Shirt
    U304561-01
    $47.78
    $63.71
    $47.78
    Sold out
  • Drifire DF2-245LP Flame Resistant Heavyweight Long John Style Pant
    D3011017-02
    from $96.90
    $102.00
    from $96.90
    Sold out
  • Drifire DF2-762CB Flame Resistant Heavyweight Cold Weather Balaclava
    D3011027-01
    $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
    D3011021-02
    from $73.15
    $77.00
    from $73.15
    Sold out
  • Drifire DF4-505TS Flame Resistant Ultra Lightweight Short Sleeve Tee
    D3011019-02
    from $57.00
    $60.00
    from $57.00
    Sold out
  • Drifire DF2-762HB Flame Resistant Hot Weather Balaclava
    D3011015-01
    $38.95
    $41.00
    $38.95
    Sold out
  • Drifire DF4-505BB Ultra-Lightweight Flame Resistant Boxer Briefs
    D3011022-01
    from $55.10
    $58.00
    from $55.10
    Sold out
  • TruSpec Gen III ECWCS Level 1 Balaclava
    T301701-01
    $7.95
    $8.95
    $7.95
    Sold out
  • Portwest FR09 Flame Resistant Antistatic Balaclava
    P300223
    $22.29
    $27.90
    $22.29
    Sold out
  • Portwest FR19 Flame Resistant Antistatic Neck Tube
    P300225
    $14.18
    $17.70
    $14.18
    Sold out
  • Danner H50201 TFX Hot Weather DryMax Over-Calf Socks - Foliage Green
    D2001196-01
    $15.00
    $15.00
    Sold out
  • Danner H50203 TFX Hot Weather DryMax Over-Calf Socks - Coyote Brown
    D2001198-01
    $15.00
    $15.00
    Sold out
  • Danner H50211 TFX Hot Weather DryMax Over-Calf Socks - Black
    D2001199-01
    $15.00
    $15.00
    Sold out
  • Danner H50212 TFX Hot Weather DryMax Crew Socks - Black
    D2001200-01
    $14.00
    $14.00
    Sold out
  • Indera Mills 810DR Traditional Long John Thermal Drawers - Colors
    E304874
    from $11.99
    from $11.99
    Sold out
  • Indera Mills 810LS Traditional Long John Thermal Long Sleeve Shirt - Colors
    E304873
    from $11.99
    from $11.99
    Sold out
  • Indera Mills 860US/T860US/865US/T865US 100% Cotton Thermal Unionsuit
    E304875
    from $29.99
    from $29.99
    Sold out
  • Indera Mills 31DR Dual Face Raschel Knit Performance Thermal Drawers with Silvadur
    E304879
    from $18.99
    from $18.99
    Sold out
  • Indera Mills 31LS Dual Face Raschel Knit Performance Thermal Long Sleeve Shirt with Silvadur
    E304878
    from $18.99
    from $18.99
    Sold out
  • Indera Mills 985LS Military Weight Fleeced Polyester Thermal Long Sleeve Shirt
    E304880
    from $22.99
    from $22.99
    Sold out
  • Indera Mills 985DR Military Weight Fleeced Polyester Thermal Drawers
    E304882
    from $22.99
    from $22.99
    Sold out
  • Bulwark MPS4 Men
    B300414-01
    $67.31
    $0.00
    $67.31
    Sold out
  • Bulwark MPS8 Men
    B300415-01
    $73.37
    $0.00
    $73.37
    Sold out