CrewBoss Gen II Response Jacket — Sigma 4 Star
SKU: 4338927893

CrewBoss Gen II Response Jacket — Sigma 4 Star

Sale price$169.20 Regular price$188.00
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Description

CrewBoss Gen II Response Jacket — Sigma 4 StarGEN II RESPONSE JACKET 7. 0 OZ SIGMA 4 STAR NOMEX IIIA YELLOW The future of single layer wildland PPE has arrived with the introduction of the CrewBoss Gen II Response Jacket. This NFPA 1977 certified jacket achieves new levels of breathability, thermal protection, and comfort. Combine the CrewBoss Gen II Response Jacket with a pair of CrewBoss Gen II Tactical or Uniform Pants, and you have the most advanced wildland garment system on the market.

 

GEN II RESPONSE JACKET
7.0 OZ SIGMA 4 STAR NOMEX IIIA YELLOW

The future of single-layer wildland PPE has arrived with the introduction of the CrewBoss Gen II Response Jacket. This NFPA 1977 certified jacket achieves new levels of breathability, thermal protection, and comfort.

Combine the CrewBoss Gen II Response Jacket with a pair of CrewBoss Gen II Tactical or Uniform Pants, and you have the most advanced wildland garment system on the market.

About the Gen II Program

The Gen II system created in conjunction with the US Department of Homeland Security, the Army’s Natick research center, and numerous other government agencies. The goal of the program was to develop garments that could offer optimal protection against the risks faced by modern wildland firefighters. Flame resistance was a priority, but a high emphasis was also placed on breathability to reduce the risk of heat stroke and exhaustion in warm environments.

The program set high standards, all of which are met or exceeded by the CrewBoss Gen II Garment System.

Features

  • Certified to NFPA 1977
  • Extra-large YKK zipper closure
  • Sewn-in radio pocket
  • Bellowed chest pocket lies flush when not in use
  • Dual mic tabs
  • Scotchlite silver reflective trim on both biceps
  • Hook & loop collar closure
  • Hook & loop cuff closure
  • Bi-swing back for added mobility

    Sigma 4 Star

    Using a revolutionary, proprietary fiber blends Sigma 4 Star fabric offers high levels of thermal protection, while still being exceptionally breathable.

    Blend
    45% meta-aramid
    32% Lenzing FR®
    17% Polyamide
    6% para-aramid

    Thermal Protection Specs

    • Heat protection (RPP): 11.5 cals/cm²
    • Breathability (THL): 752 W/m²

       

      Sizing Chart Lead times during fire season

      Note: CrewBoss garments are available in additional sizes not shown in our shopping cart. There are also many additional options, such as zippers, reflective trim, etc., that may be added. Kindly call our Customer Service Team at 800-759-3473 or send an email to [email protected] to discuss your requirements.

      Shipping Notes
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      Exchange/Return Notes
      • We offer a 30-day return/exchange service after receiving.
      • Final sale items are not eligible for returns or exchanges.
      • To process your return/exchange, please contact us at [email protected]
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      SKU: 4338927893

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      Peter
      Carnegie, US
      ★★★★★ 5
      CODE is the book you should get.
      Format: Paperback
      The best book to enter the field. Grateful that Charles Petzold decided to write it, even happier this was one of the first books I picked up. Recommend to everyone wanting to become a programmer, or just interested in computers.
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      Reviewed in the United States on January 12, 2026
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      Michael Donoghue
      Cuba, US
      ★★★★★ 5
      If you only buy one technical computer book, this is it
      Format: Paperback
      Disclaimer: I owned the first edition for years and read it a dozen times, mainly for pleasure since it’s not only informative but also just enjoyable to read. I’m a professional software architect and have dozens of textbooks on computer science and engineering so I’ve been around the block. This is the kind of book I would buy all for all my friends (if I had more than a couple) and family members (if they were even slightly into computers, which they aren’t sadly). Petzold does an exceptional job at describing digital logic and guides you through building a conceptual CPU from very first principles. I think his bottom up approach is the way to go and has helped me understand complex topics in an extremely simple way. When I’m not reading fiction, this is my go to bedtime reading. The second edition has about 100 more pages than the first and some content has been completely reworked and it’s great. If you ever had even a passing interest in knowing how computers work at a very fundamental level, get this book!
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      Reviewed in the United States on January 31, 2023
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      Yura
      Dallas, US
      ★★★★★ 4
      First programmer?
      Format: Paperback
      As an ardent reader of the past 1st edition, I was fairly excited to get the latest version. That is, until I encountered the history chapter of the new edition. For one thing, what I do NOT understand in this second edition is the newly added description of August Ada Byron (countless of Lovelace). The author claims it was Babbage who was the first programmer to design the engines, not Ada. I am not trying to start a futile argument here about who has more or fewer contributions, etc. What I am trying to assert here is that it is undisputed that Ada (unless the new evidence arises) left *the very first demonstration* of what this seemingly imaginary machine, which didn't even physically exist, was capable of through her program. Because Babbage designed the engine itself, that doesn't automatically put him in the position of a programmer (despite Babbage being a brilliant engineer/scientist and may have had a simple or detailed program in his mind). However, it was Ada who gave a definite touch to programming concepts that ultimately led to modern-day programming. Ada deserves more recognition than a mere "tutorial writer," and she is certainly entitled to the title she deserves. Other than that, like the previous edition, this book is a must-read for people who are from related/unrelated fields. I always loved the 1st edition, and I would do too with the 2nd. Still, I think history should always be approached with more care, particularly if matters have potential controversies.
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      Reviewed in the United States on January 6, 2023
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      Ben Fleury
      Belleville, US
      ★★★★★ 5
      One of the few books worth your time
      Format: Paperback
      If you want to learn computers, start here. Learning from a historical perspective removes complexity of trying to start with say GPUs - you learn just like computer engineers did, incrementally.
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      Reviewed in the United States on April 27, 2026
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      Kevin
      Fort Morgan, US
      ★★★★★ 5
      An absolutely brilliant book
      Format: Paperback
      This is an amazing book for the right kind of reader. It's a lot like Euclid's Elements but for computers as it leads the reader through designing a computer from first principles and builds to the point of creating software and adding peripherals. It's an amazingly clear but slightly challenging read. I have given this book as a gift many many times. It's an absolute classic in my opinion.
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      Reviewed in the United States on March 19, 2025

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