Free Shipping Over $75 On Thousands of Items

Base Layer and Thermal Underwear

  • Home /
  • Base Layer and Thermal Underwear

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.

Sort by

Filter by Brand

  • I304856
    $5.85
    $5.85
    Sold out
  • D302232
    $27.50
    $27.50
    Sold out
  • T301616
    from $19.95
    from $19.95
    Sold out
  • D6001029
    from $50.85
    from $50.85
    Sold out
  • D304486
    from $94.85
    from $94.85
    Sold out
  • D304487
    from $87.85
    from $87.85
    Sold out
  • D304485
    from $65.85
    from $65.85
    Sold out
  • N304897
    $29.70
    $29.70
    Sold out
  • N304896
    $21.70
    $21.70
    Sold out
  • C304963
    from $64.15
    from $64.15
    Sold out
  • C304962
    from $64.15
    from $64.15
    Sold out
  • C304960
    from $71.80
    from $71.80
    Sold out
  • C304959
    from $71.80
    from $71.80
    Sold out
  • D304493
    from $31.50
    from $31.50
    Sold out
  • D304492
    $54.10
    $54.10
    Sold out
  • D304491
    from $89.50
    from $89.50
    Sold out
  • D304490
    from $52.90
    from $52.90
    Sold out
  • D304489
    from $44.10
    from $44.10
    Sold out
  • D301842
    from $64.30
    from $64.30
    Sold out
  • D301843
    from $73.50
    from $73.50
    Sold out
  • D301853
    from $77.40
    from $77.40
    Sold out
  • D301852
    from $56.10
    from $56.10
    Sold out
  • D304484
    from $83.90
    from $83.90
    Sold out
  • I304894
    $8.85
    $8.85
    Sold out
  • I304895
    $8.85
    $8.85
    Sold out
  • I304893
    $7.85
    $7.85
    Sold out
  • I304892
    $7.85
    $7.85
    Sold out
  • I304891
    $7.85
    $7.85
    Sold out
  • I304890
    $7.85
    $7.85
    Sold out
  • I304861
    $9.85
    $9.85
    Sold out
  • I304860
    $9.85
    $9.85
    Sold out
  • I304859
    $7.85
    $7.85
    Sold out
  • I304858
    $7.85
    $7.85
    Sold out
  • I304857
    $5.85
    $5.85
    Sold out
  • N3011106
    $80.70
    $80.70
    Sold out
  • N3011105
    $27.40
    $27.40
    Sold out
  • N3011102
    $69.70
    $69.70
    Sold out
  • N3011101
    $62.70
    $62.70
    Sold out
  • M304726
    $209.99
    $209.99
    Sold out
  • B200277
    $8.95
    $8.95
    Sold out
  • D304496
    from $59.85
    from $59.85
    Sold out
  • D3011016
    from $92.85
    from $92.85
    Sold out
  • D3011011
    $26.85
    $26.85
    Sold out
  • D3011010
    $42.85
    $42.85
    Sold out
  • U304642
    $85.95
    $85.95
    Sold out
  • B200766
    $15.95
    $15.95
    Sold out
  • U304595
    $33.44
    $33.44
    Sold out
  • U304594
    $24.62
    $24.62
    Sold out