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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.


  • 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. 

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  to discuss your requirements.

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CrewBoss Gen II Response Jacket — Sigma 4 Star

  • $311.95

Available Options

Delivery/Shipping Availability: Item ships directly from manufacturer. Please call us for availability.

Tags: CrewBoss Gen II Response Jacket — Sigma 4 Star Yellow, Crew Boss, CrewBoss, Wildland Jackets, Sigma 4, WLS0772