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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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  • Tru-Spec Cordura Baselayer Crew Neck Shirts
    T301616-01
    $25.95
    $30.95
    $25.95
    Sold out
  • Drifire DF4-505TSW Women
    D6001029-02
    from $57.00
    $60.00
    from $57.00
    Sold out
  • Drifire DF2-MIL-762-PLP Prime FR Mid-Weight Soft Compression Long Johns
    D304486-03
    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
    D304487-02
    from $93.60
    $104.00
    from $93.60
    Sold out
  • Drifire DF2-MIL-762-PBB Prime FR Mid-Weight Soft Compression Boxer Brief
    D304485-03
    from $74.10
    $78.00
    from $74.10
    Sold out
  • Drifire DF2-762-SB Women
    D304496-01
    from $64.60
    $68.00
    from $64.60
    Sold out
  • Enespro H11RY Lightweight Ultrasoft Flame Resistant Balaclava (HRC 2 - 12 cal)
    N304896
    $34.20
    $36.00
    $34.20
    Sold out
  • Drifire DF2-446BB Flame Resistant Lightweight Boxer Briefs (HRC 1 - 4.5 cal)
    D304493-01
    from $54.20
    $62.70
    from $54.20
    Sold out
  • Drifire DF2-446LP FR Lightweight Flame Resistant Long Underwear Bottoms (HRC 1 - 4.9 cal)
    D304492-01
    from $84.60
    $218.15
    from $84.60
    Sold out
  • Drifire DF2-CM-265ALS FR Heavyweight Flame Resistant Long Sleeve Tee Shirt (HRC 2 - 11 cal)
    D304491-01
    from $134.10
    $149.00
    from $134.10
    Sold out
  • Drifire DF2-CM-446LS FR Lightweight Flame Resistant Long Sleeve Tee Shirt (HRC 1 - 4.5 cal)
    D304490-01
    from $81.70
    $86.00
    from $81.70
    Sold out
  • Drifire DF2-CM-446TS FR Lightweight Flame Resistant Short Sleeve Tee Shirt (HRC 1 - 4.5 cal)
    D304489-01
    from $67.50
    $71.00
    from $67.50
    Sold out
  • Drifire DF2-CM-762-PTS FR Prime Flame Resistant Short Sleeve Tee Shirt (HRC 1 - 4.9 cal)
    D301842-01
    from $94.50
    $115.50
    from $94.50
    Sold out
  • Drifire DF2-CM-762-PLS FR Prime Flame Resistant Long Sleeve Tee Shirt (HRC 1 - 4.9 cal)
    D301843-01
    from $108.90
    $121.00
    from $108.90
    Sold out
  • Drifire DF2-CM-762-PLP FR Prime Flame Resistant Long Johns (HRC 1 - 4.9 cal)
    D301853-01
    from $113.40
    $126.00
    from $113.40
    Sold out
  • Enespro H11RV Heavyweight Flame Resistant Balaclava (HRC 3 - 25 cal)
    N304897-01
    $47.50
    $50.00
    $47.50
    Sold out
  • Drifire DF2-CM-762-PBB FR Prime Flame Resistant Boxer Briefs (HRC 1 - 4.9 cal)
    D301852-01
    from $90.30
    $139.09
    from $90.30
    Sold out
  • Indera Mills 890LS Expedition Weight Cotton Raschel Knit Long John Thermal Long Sleeve Shirt
    E304894
    from $14.99
    from $14.99
    Sold out
  • Indera Mills 890DR Expedition Weight Cotton Raschel Knit Long John Thermal Drawers
    E304895
    from $14.99
    from $14.99
    Sold out
  • Indera Mills 822DR Maximum Weight Long John Thermal Drawers
    E304893
    from $12.99
    from $12.99
    Sold out
  • Indera Mills 822LS Maximum Weight Long John Thermal Long Sleeve Shirt
    E304892
    from $12.99
    from $12.99
    Sold out
  • Indera Mills 880LS Raschel Knit Heavyweight Long John Thermal Long Sleeve Shirt
    E304891
    from $11.99
    from $11.99
    Sold out
  • Indera Mills 880DR Raschel Knit Heavyweight Long John Thermal Drawers
    E304890
    from $11.99
    from $11.99
    Sold out
  • Indera Mills 21LS Polypropylene Long John Thermal Long Sleeve Shirt
    E304860
    from $15.99
    from $15.99
    Sold out
  • Indera Mills 839DR Cotton Heavyweight Long John Thermal Drawers
    E304859
    from $9.99
    from $9.99
    Sold out
  • Indera Mills 839LS Cotton Heavyweight Long John Thermal Long Sleeve Shirt
    E304858
    from $9.99
    from $9.99
    Sold out
  • Drifire U52FKSR Navy Blue Flame Resistant Long Underwear Bottoms (HRC 1 - 4.0 cal)
    N3011106-01
    from $121.50
    $148.50
    from $121.50
    Sold out
  • Drifire H85FK Navy Blue Flame Resistant Balaclava (HRC 1 - 4.0 cal)
    N3011105-01
    $43.70
    $46.00
    $43.70
    Sold out
  • Drifire C52 Flame Resistant Long Sleeve T-Shirt - NSA Style C52FKSRLS C52JKSRLS (HRC 1 - 4.0 cal)
    N3011102-01
    from $105.30
    $117.00
    from $105.30
    Sold out
  • Drifire C52 Flame Resistant Short Sleeve T-Shirt - NSA Style C52FKSR C52JKSR (HRC 1 - 4.0 cal)
    N3011101-01
    from $94.50
    $153.73
    from $94.50
    Sold out
  • Indera Mills 21DR Polypropylene Long John Thermal Drawers
    E304861
    from $15.99
    from $15.99
    Sold out
  • Massif MPNT00004 Flame Resistant Flamestretch Pants
    M304726
    $258.07
    $271.65
    $258.07
    Sold out
  • Drifire DF2-245LS Flame Resistant Heavyweight Base Layer Long Sleeve Shirt
    D3011016-01
    from $102.60
    $114.00
    from $102.60
    Sold out
  • Drifire DF2-762HNG Flame Resistant Hot Weather Neck Gaiter
    D3011011-01
    $27.55
    $29.00
    $27.55
    Sold out
  • Drifire DF2-762CNG Flame Resistant Cold Weather Neck Gaiter
    D3011010-01
    $47.50
    $50.00
    $47.50
    Sold out
  • UJF A14F102 Fortiflame Baselayer Level 4 Quarter Zip Top
    U304642-01
    $78.49
    $104.65
    $78.49
    Sold out
  • Bates E11917170-001 Utility Crew Socks (2 pack) - Black
    B200766-01
    $17.95
    $17.95
    $17.95
    Sold out
  • UJF D11H402 Fortiflame Baselayer Level 1 Flame Resistant Cold Weather Balaclava
    U304595-01
    $32.29
    $43.06
    $32.29
    Sold out
  • UJF D11G402 Fortiflame Baselayer Level 1 Flame Resistant Hot Weather Balaclava
    U304594-01
    $25.44
    $33.91
    $25.44
    Sold out
  • UJF D11H403 Fortiflame Baselayer Level 1 Flame Resistant Cold Weather Neck Gaiter
    U304593-01
    $21.83
    $29.11
    $21.83
    Sold out
  • UJF D11G403 Fortiflame Baselayer Level 1 Flame Resistant Hot Weather Neck Gaiter
    U304592-01
    $18.46
    $24.61
    $18.46
    Sold out
  • UJF A14F200 Fortiflame Baselayer Level 4 Flame Resistant Long Pants with Fly
    U304591-01
    $74.82
    $99.76
    $74.82
    Sold out
  • UJF A14F101 Fortiflame Baselayer Level 4 Flame Resistant Long Sleeve Crew Shirt
    U304590-01
    $75.15
    $100.21
    $75.15
    Sold out
  • UJF A13D200 Fortiflame Baselayer Level 3 Flame Resistant Long Pants with Fly
    U304589-01
    $59.41
    $79.21
    $59.41
    Sold out
  • UJF A13D101 Fortiflame Baselayer Level 3 Flame Resistant Long Sleeve Crew Shirt
    U304588-01
    $59.72
    $79.63
    $59.72
    Sold out
  • UJF A11C200 Fortiflame Baselayer Level 2 Flame Resistant Long Pants with Fly
    U304568-01
    $53.84
    $71.79
    $53.84
    Sold out
  • UJF A11C101 Fortiflame Baselayer Level 2 Flame Resistant Long Sleeve Crew Shirt
    U304567-01
    $54.16
    $72.21
    $54.16
    Sold out
  • UJF W11B301 Fortiflame Baselayer Level 1 Flame Resistant Women
    U304566-01
    $21.40
    $28.54
    $21.40
    Sold out