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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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  • Indera Mills 800LS Traditional Long John Thermal Long Sleeve Shirt
    I304856
    from $6.99
    from $6.99
    Sold out
  • Tru-Spec Cordura Baselayer Crew Neck Shirts
    T301616
    $23.95
    $23.95
    Sold out
  • 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
  • NSA H11RV Heavyweight Flame Resistant Balaclava (HRC 3 - 25 cal)
    N304897
    $37.60
    $47.00
    $37.60
    Sold out
  • NSA H11RY Lightweight Ultrasoft Flame Resistant Balaclava (HRC 2 - 12 cal)
    N304896
    $27.20
    $34.00
    $27.20
    Sold out
  • Chicago Protective Apparel CXA-55 CarbonX Active Flame Resistant Base Layer Pant (10 ATPV)
    C304963
    from $70.80
    from $70.80
    Sold out
  • Chicago Protective Apparel CXA-54 CarbonX Active Flame Resistant Base Layer Long Sleeve Shirt (10 ATPV)
    C304962
    from $70.80
    from $70.80
    Sold out
  • Chicago Protective Apparel CX-55 CarbonX Ultimate Flame Resistant Baselayer Pant (12.3 ATPV)
    C304960
    from $79.20
    from $79.20
    Sold out
  • Chicago Protective Apparel CX-54 CarbonX Ultimate Baselayer Flame Resistant Long Sleeve Shirt (12.3 ATPV)
    C304959
    from $79.20
    from $79.20
    Sold out
  • Drifire DF2-446BB Flame Resistant Lightweight Boxer Briefs (HRC 1 - 4.5 cal)
    D304493-01
    from $43.20
    $54.00
    from $43.20
    Sold out
  • Drifire DF2-446LP FR Lightweight Flame Resistant Long Underwear Bottoms (HRC 1 - 4.9 cal)
    D304492-01
    from $67.20
    $84.00
    from $67.20
    Sold out
  • Drifire DF2-CM-265ALS FR Heavyweight Flame Resistant Long Sleeve Tee Shirt (HRC 2 - 11 cal)
    D304491-01
    from $112.00
    $140.00
    from $112.00
    Sold out
  • Drifire DF2-CM-446LS FR Lightweight Flame Resistant Long Sleeve Tee Shirt (HRC 1 - 4.5 cal)
    D304490-01
    from $64.80
    $81.00
    from $64.80
    Sold out
  • Drifire DF2-CM-446TS FR Lightweight Flame Resistant Short Sleeve Tee Shirt (HRC 1 - 4.5 cal)
    D304489-01
    from $53.60
    $67.00
    from $53.60
    Sold out
  • Drifire DF2-CM-762-PTS FR Prime Flame Resistant Short Sleeve Tee Shirt (HRC 1 - 4.9 cal)
    D301842-01
    from $79.20
    $99.00
    from $79.20
    Sold out
  • Drifire DF2-CM-762-PLS FR Prime Flame Resistant Long Sleeve Tee Shirt (HRC 1 - 4.9 cal)
    D301843-01
    from $91.20
    $114.00
    from $91.20
    Sold out
  • Drifire DF2-CM-762-PLP FR Prime Flame Resistant Long John Pants (HRC 1 - 4.9 cal)
    D301853-01
    from $96.00
    $120.00
    from $96.00
    Sold out
  • Drifire DF2-CM-762-PBB FR Prime Flame Resistant Boxer Briefs (HRC 1 - 4.9 cal)
    D301852-01
    from $71.20
    $89.00
    from $71.20
    Sold out
  • Drifire DF2-793LS FR Strongknit Prime Flame Resistant Long Sleeve T-Shirt (HRC 2 - 10 cal)
    D304484-01
    from $103.20
    $129.00
    from $103.20
    Sold out
  • Indera Mills 890LS Expedition Weight Cotton Raschel Knit Long John Thermal Long Sleeve Shirt
    I304894
    from $14.99
    from $14.99
    Sold out
  • Indera Mills 890DR Expedition Weight Cotton Raschel Knit Long John Thermal Drawers
    I304895
    from $14.99
    from $14.99
    Sold out
  • Indera Mills 822DR Maximum Weight Long John Thermal Drawers
    I304893
    from $12.99
    from $12.99
    Sold out
  • Indera Mills 822LS Maximum Weight Long John Thermal Long Sleeve Shirt
    I304892
    from $12.99
    from $12.99
    Sold out
  • Indera Mills 880LS Raschel Knit Heavyweight Long John Thermal Long Sleeve Shirt
    I304891
    from $11.99
    from $11.99
    Sold out
  • Indera Mills 880DR Raschel Knit Heavyweight Long John Thermal Drawers
    I304890
    from $11.99
    from $11.99
    Sold out
  • Indera Mills 21DR Polypropylene Long John Thermal Drawers
    I304861
    from $15.99
    from $15.99
    Sold out
  • Indera Mills 21LS Polypropylene Long John Thermal Long Sleeve Shirt
    I304860
    from $15.99
    from $15.99
    Sold out
  • Indera Mills 839DR Cotton Heavyweight Long John Thermal Drawers
    I304859
    from $9.99
    from $9.99
    Sold out
  • Indera Mills 839LS Cotton Heavyweight Long John Thermal Long Sleeve Shirt
    I304858
    from $9.99
    from $9.99
    Sold out
  • Indera Mills 800DR Traditional Long John Thermal Drawers
    I304857
    from $6.99
    from $6.99
    Sold out
  • NSA FR Control 2.0 U52FKSR Navy Blue Flame Resistant Long Underwear Bottoms (HRC 1 - 4.0 cal)
    N3011106
    from $101.60
    $127.00
    from $101.60
    Sold out
  • NSA FR Control 2.0 H85FK Navy Blue Flame Resistant Balaclava (HRC 1 - 4.0 cal)
    N3011105
    $35.20
    $44.00
    $35.20
    Sold out
  • NSA FR Control 2.0 C52 Flame Resistant Long Sleeve T-Shirt - NSA Style C52FKSRLS C52JKSRLS (HRC 1 - 4.0 cal)
    N3011102
    from $88.00
    $110.00
    from $88.00
    Sold out
  • NSA FR Control 2.0 C52 Flame Resistant Short Sleeve T-Shirt - NSA Style C52FKSR C52JKSR (HRC 1 - 4.0 cal)
    N3011101
    from $79.20
    $99.00
    from $79.20
    Sold out
  • Massif MPNT00004 Flame Resistant Flamestretch Pants
    M304726-01
    $228.30
    $253.67
    $228.30
    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
  • UJF A14F102 Fortiflame Baselayer Level 4 Quarter Zip Top
    U304642
    $85.95
    $85.95
    Sold out
  • Bates E11917170 Utility Crew Socks (2 pack) - Black
    B200766
    $17.95
    $17.95
    $17.95
    Sold out
  • UJF D11H402 Fortiflame Baselayer Level 1 Flame Resistant Cold Weather Balaclava
    U304595
    $33.44
    $33.44
    Sold out
  • UJF D11G402 Fortiflame Baselayer Level 1 Flame Resistant Hot Weather Balaclava
    U304594
    $24.62
    $24.62
    Sold out
  • UJF D11H403 Fortiflame Baselayer Level 1 Flame Resistant Cold Weather Neck Gaiter
    U304593
    $21.09
    $21.09
    Sold out
  • UJF D11G403 Fortiflame Baselayer Level 1 Flame Resistant Hot Weather Neck Gaiter
    U304592
    $17.56
    $17.56
    Sold out