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.

  • Tru-Spec Cordura Baselayer Crew Neck Shirts
    Tru-Spec Cordura Baselayer Crew Neck Shirts
    T301616
    Regular price
    $25.95
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    Regular price
    $30.95
    $25.95
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  • Drifire DF4-505TSW Women's Flame Resistant Ultra Lightweight Short Sleeve Tee
    Drifire DF4-505TSW Women
    D6001029-2
    Regular price
    from $57.00
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    Regular price
    $60.00
    from $57.00
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  • Drifire DF2-MIL-762-PLP Prime FR Mid-Weight Soft Compression Long Johns
    Drifire DF2-MIL-762-PLP Prime FR Mid-Weight Soft Compression Long Johns
    D304486-3
    Regular price
    from $99.00
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    Regular price
    $110.00
    from $99.00
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  • Drifire DF2-MIL-762-PLS Prime FR Mid-Weight Soft Compression Long Sleeve Tee Shirt
    Drifire DF2-MIL-762-PLS Prime FR Mid-Weight Soft Compression Long Sleeve Tee Shirt
    D304487-2
    Regular price
    from $93.60
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    Regular price
    $104.00
    from $93.60
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  • Drifire DF2-MIL-762-PBB Prime FR Mid-Weight Soft Compression Boxer Brief
    Drifire DF2-MIL-762-PBB Prime FR Mid-Weight Soft Compression Boxer Brief
    D304485-3
    Regular price
    from $74.10
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    Regular price
    $78.00
    from $74.10
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  • Drifire DF2-762-SB Women's Prime FR Mid-Weight Soft Compression Sports Bra (HRC 1 - 4.4 cal)
    Drifire DF2-762-SB Women
    D304496
    Regular price
    from $64.60
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    Regular price
    $68.00
    from $64.60
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  • Indera Mills 800LS Traditional Long John Thermal Long Sleeve Shirt
    Indera Mills 800LS Traditional Long John Thermal Long Sleeve Shirt
    E304856
    Regular price
    from $6.99
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    Regular price
    from $6.99
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  • Enespro H11RY Lightweight Ultrasoft Flame Resistant Balaclava (HRC 2 - 12 cal)
    Enespro H11RY Lightweight Ultrasoft Flame Resistant Balaclava (HRC 2 - 12 cal)
    N304896
    Regular price
    $34.20
    Sale price
    Regular price
    $36.00
    $34.20
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  • Drifire DF2-446BB Flame Resistant Lightweight Boxer Briefs (HRC 1 - 4.5 cal)
    Drifire DF2-446BB Flame Resistant Lightweight Boxer Briefs (HRC 1 - 4.5 cal)
    D304493-01
    Regular price
    from $54.20
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    Regular price
    $62.70
    from $54.20
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  • Drifire DF2-446LP FR Lightweight Flame Resistant Long Underwear Bottoms (HRC 1 - 4.9 cal)
    Drifire DF2-446LP FR Lightweight Flame Resistant Long Underwear Bottoms (HRC 1 - 4.9 cal)
    D304492-01
    Regular price
    from $84.60
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    Regular price
    $218.15
    from $84.60
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  • Drifire DF2-CM-265ALS FR Heavyweight Flame Resistant Long Sleeve Tee Shirt (HRC 2 - 11 cal)
    Drifire DF2-CM-265ALS FR Heavyweight Flame Resistant Long Sleeve Tee Shirt (HRC 2 - 11 cal)
    D304491-01
    Regular price
    from $134.10
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    Regular price
    $149.00
    from $134.10
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  • Drifire DF2-CM-446LS FR Lightweight Flame Resistant Long Sleeve Tee Shirt (HRC 1 - 4.5 cal)
    Drifire DF2-CM-446LS FR Lightweight Flame Resistant Long Sleeve Tee Shirt (HRC 1 - 4.5 cal)
    D304490-01
    Regular price
    from $81.70
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    Regular price
    $86.00
    from $81.70
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  • Drifire DF2-CM-446TS FR Lightweight Flame Resistant Short Sleeve Tee Shirt (HRC 1 - 4.5 cal)
    Drifire DF2-CM-446TS FR Lightweight Flame Resistant Short Sleeve Tee Shirt (HRC 1 - 4.5 cal)
    D304489-01
    Regular price
    from $67.50
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    Regular price
    $71.00
    from $67.50
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  • Drifire DF2-CM-762-PTS FR Prime Flame Resistant Short Sleeve Tee Shirt (HRC 1 - 4.9 cal)
    Drifire DF2-CM-762-PTS FR Prime Flame Resistant Short Sleeve Tee Shirt (HRC 1 - 4.9 cal)
    D301842-01
    Regular price
    from $94.50
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    Regular price
    $115.50
    from $94.50
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  • Drifire DF2-CM-762-PLS FR Prime Flame Resistant Long Sleeve Tee Shirt (HRC 1 - 4.9 cal)
    Drifire DF2-CM-762-PLS FR Prime Flame Resistant Long Sleeve Tee Shirt (HRC 1 - 4.9 cal)
    D301843-01
    Regular price
    from $108.90
    Sale price
    Regular price
    $121.00
    from $108.90
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    per 
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  • Drifire DF2-CM-762-PLP FR Prime Flame Resistant Long Johns (HRC 1 - 4.9 cal)
    Drifire DF2-CM-762-PLP FR Prime Flame Resistant Long Johns (HRC 1 - 4.9 cal)
    D301853-01
    Regular price
    from $113.40
    Sale price
    Regular price
    $126.00
    from $113.40
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  • Enespro H11RV Heavyweight Flame Resistant Balaclava (HRC 3 - 25 cal)
    Enespro H11RV Heavyweight Flame Resistant Balaclava (HRC 3 - 25 cal)
    N304897
    Regular price
    $47.50
    Sale price
    Regular price
    $50.00
    $47.50
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  • Drifire DF2-CM-762-PBB FR Prime Flame Resistant Boxer Briefs (HRC 1 - 4.9 cal)
    Drifire DF2-CM-762-PBB FR Prime Flame Resistant Boxer Briefs (HRC 1 - 4.9 cal)
    D301852-01
    Regular price
    from $90.30
    Sale price
    Regular price
    $139.09
    from $90.30
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    per 
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  • Indera Mills 890LS Expedition Weight Cotton Raschel Knit Long John Thermal Long Sleeve Shirt
    Indera Mills 890LS Expedition Weight Cotton Raschel Knit Long John Thermal Long Sleeve Shirt
    E304894
    Regular price
    from $14.99
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    Regular price
    from $14.99
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  • Indera Mills 890DR Expedition Weight Cotton Raschel Knit Long John Thermal Drawers
    Indera Mills 890DR Expedition Weight Cotton Raschel Knit Long John Thermal Drawers
    E304895
    Regular price
    from $14.99
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    Regular price
    from $14.99
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  • Indera Mills 822DR Maximum Weight Long John Thermal Drawers
    Indera Mills 822DR Maximum Weight Long John Thermal Drawers
    E304893
    Regular price
    from $12.99
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    Regular price
    from $12.99
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  • Indera Mills 822LS Maximum Weight Long John Thermal Long Sleeve Shirt
    Indera Mills 822LS Maximum Weight Long John Thermal Long Sleeve Shirt
    E304892
    Regular price
    from $12.99
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    Regular price
    from $12.99
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  • Indera Mills 880LS Raschel Knit Heavyweight Long John Thermal Long Sleeve Shirt
    Indera Mills 880LS Raschel Knit Heavyweight Long John Thermal Long Sleeve Shirt
    E304891
    Regular price
    from $11.99
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    Regular price
    from $11.99
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  • Indera Mills 880DR Raschel Knit Heavyweight Long John Thermal Drawers
    Indera Mills 880DR Raschel Knit Heavyweight Long John Thermal Drawers
    E304890
    Regular price
    from $11.99
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    Regular price
    from $11.99
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  • Indera Mills 21LS Polypropylene Long John Thermal Long Sleeve Shirt
    Indera Mills 21LS Polypropylene Long John Thermal Long Sleeve Shirt
    E304860
    Regular price
    from $15.99
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    Regular price
    from $15.99
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  • Indera Mills 839DR Cotton Heavyweight Long John Thermal Drawers
    Indera Mills 839DR Cotton Heavyweight Long John Thermal Drawers
    E304859
    Regular price
    from $9.99
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    Regular price
    from $9.99
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  • Indera Mills 839LS Cotton Heavyweight Long John Thermal Long Sleeve Shirt
    Indera Mills 839LS Cotton Heavyweight Long John Thermal Long Sleeve Shirt
    E304858
    Regular price
    from $9.99
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    Regular price
    from $9.99
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  • Drifire U52FKSR Navy Blue Flame Resistant Long Underwear Bottoms (HRC 1 - 4.0 cal)
    Drifire U52FKSR Navy Blue Flame Resistant Long Underwear Bottoms (HRC 1 - 4.0 cal)
    N3011106
    Regular price
    from $121.50
    Sale price
    Regular price
    $148.50
    from $121.50
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  • Drifire H85FK Navy Blue Flame Resistant Balaclava (HRC 1 - 4.0 cal)
    Drifire H85FK Navy Blue Flame Resistant Balaclava (HRC 1 - 4.0 cal)
    N3011105
    Regular price
    $43.70
    Sale price
    Regular price
    $46.00
    $43.70
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  • Drifire C52 Flame Resistant Long Sleeve T-Shirt - NSA Style C52FKSRLS C52JKSRLS (HRC 1 - 4.0 cal)
    Drifire C52 Flame Resistant Long Sleeve T-Shirt - NSA Style C52FKSRLS C52JKSRLS (HRC 1 - 4.0 cal)
    N3011102
    Regular price
    from $105.30
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    Regular price
    $117.00
    from $105.30
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  • Drifire C52 Flame Resistant Short Sleeve T-Shirt - NSA Style C52FKSR C52JKSR (HRC 1 - 4.0 cal)
    Drifire C52 Flame Resistant Short Sleeve T-Shirt - NSA Style C52FKSR C52JKSR (HRC 1 - 4.0 cal)
    N3011101
    Regular price
    from $94.50
    Sale price
    Regular price
    $153.73
    from $94.50
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  • Indera Mills 21DR Polypropylene Long John Thermal Drawers
    Indera Mills 21DR Polypropylene Long John Thermal Drawers
    E304861
    Regular price
    from $15.99
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    Regular price
    from $15.99
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  • Massif MPNT00004 Flame Resistant Flamestretch Pants
    Massif MPNT00004 Flame Resistant Flamestretch Pants
    M304726
    Regular price
    $258.07
    Sale price
    Regular price
    $271.65
    $258.07
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    per 
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  • Drifire DF2-245LS Flame Resistant Heavyweight Base Layer Long Sleeve Shirt
    Drifire DF2-245LS Flame Resistant Heavyweight Base Layer Long Sleeve Shirt
    D3011016
    Regular price
    from $102.60
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    Regular price
    $114.00
    from $102.60
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  • Drifire DF2-762HNG Flame Resistant Hot Weather Neck Gaiter
    Drifire DF2-762HNG Flame Resistant Hot Weather Neck Gaiter
    D3011011
    Regular price
    $27.55
    Sale price
    Regular price
    $29.00
    $27.55
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  • Drifire DF2-762CNG Flame Resistant Cold Weather Neck Gaiter
    Drifire DF2-762CNG Flame Resistant Cold Weather Neck Gaiter
    D3011010
    Regular price
    $47.50
    Sale price
    Regular price
    $50.00
    $47.50
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  • UJF A14F102 Fortiflame Baselayer Level 4 Quarter Zip Top
    UJF A14F102 Fortiflame Baselayer Level 4 Quarter Zip Top
    U304642
    Regular price
    $78.49
    Sale price
    Regular price
    $104.65
    $78.49
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  • Bates E11917170-001 Utility Crew Socks (2 pack) - Black
    Bates E11917170-001 Utility Crew Socks (2 pack) - Black
    B200766
    Regular price
    $17.95
    Sale price
    Regular price
    $17.95
    $17.95
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  • UJF D11H402 Fortiflame Baselayer Level 1 Flame Resistant Cold Weather Balaclava
    UJF D11H402 Fortiflame Baselayer Level 1 Flame Resistant Cold Weather Balaclava
    U304595
    Regular price
    $32.29
    Sale price
    Regular price
    $43.06
    $32.29
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  • UJF D11G402 Fortiflame Baselayer Level 1 Flame Resistant Hot Weather Balaclava
    UJF D11G402 Fortiflame Baselayer Level 1 Flame Resistant Hot Weather Balaclava
    U304594
    Regular price
    $25.44
    Sale price
    Regular price
    $33.91
    $25.44
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  • UJF D11H403 Fortiflame Baselayer Level 1 Flame Resistant Cold Weather Neck Gaiter
    UJF D11H403 Fortiflame Baselayer Level 1 Flame Resistant Cold Weather Neck Gaiter
    U304593
    Regular price
    $21.83
    Sale price
    Regular price
    $29.11
    $21.83
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  • UJF D11G403 Fortiflame Baselayer Level 1 Flame Resistant Hot Weather Neck Gaiter
    UJF D11G403 Fortiflame Baselayer Level 1 Flame Resistant Hot Weather Neck Gaiter
    U304592
    Regular price
    $18.46
    Sale price
    Regular price
    $24.61
    $18.46
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  • UJF A14F200 Fortiflame Baselayer Level 4 Flame Resistant Long Pants with Fly
    UJF A14F200 Fortiflame Baselayer Level 4 Flame Resistant Long Pants with Fly
    U304591
    Regular price
    $74.82
    Sale price
    Regular price
    $99.76
    $74.82
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  • UJF A14F101 Fortiflame Baselayer Level 4 Flame Resistant Long Sleeve Crew Shirt
    UJF A14F101 Fortiflame Baselayer Level 4 Flame Resistant Long Sleeve Crew Shirt
    U304590
    Regular price
    $75.15
    Sale price
    Regular price
    $100.21
    $75.15
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  • Indera Mills 800DR Thermal Drawers - Traditional Long Johns
    Indera Mills 800DR Thermal Drawers - Traditional Long Johns
    E304857
    Regular price
    from $6.99
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    Regular price
    from $6.99
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  • UJF A13D200 Fortiflame Baselayer Level 3 Flame Resistant Long Pants with Fly
    UJF A13D200 Fortiflame Baselayer Level 3 Flame Resistant Long Pants with Fly
    U304589
    Regular price
    $59.41
    Sale price
    Regular price
    $79.21
    $59.41
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  • UJF A13D101 Fortiflame Baselayer Level 3 Flame Resistant Long Sleeve Crew Shirt
    UJF A13D101 Fortiflame Baselayer Level 3 Flame Resistant Long Sleeve Crew Shirt
    U304588
    Regular price
    $59.72
    Sale price
    Regular price
    $79.63
    $59.72
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  • UJF A11C200 Fortiflame Baselayer Level 2 Flame Resistant Long Pants with Fly
    UJF A11C200 Fortiflame Baselayer Level 2 Flame Resistant Long Pants with Fly
    U304568
    Regular price
    $53.84
    Sale price
    Regular price
    $71.79
    $53.84
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