Vertx Thirty Seven FiveVertx Thirty Seven Five

37.5® Active Particle Technology

You work hard and you need gear that can keep you going. That's why at Vertx® we strive to incorporate the best performance technology into our apparel. Our partnership with 37.5® Active Particle Technology started 10 years ago with our Integrity Shell Jacket and now encompasses a full line of shirts, pants, and accessories. In any condition, 37.5® fabrics are working with your natural microclimate to keep you performing at your peak, longer. By capturing your natural infrared (IR) energy, 37.5® can evaporate moisture to keep you cool or reflect it back to you to keep you warm so, you can stay comfortable no matter the weather or activity.


Benefits of 37.5®Active Particle Technology:

  • Increases comfort and performance
  • Helps warm you up when you're cold and cool you down when you're hot
  • Helps you maintain a comfortable personal microclimate relative humidity of 37.5%
  • Removes sweat in the vapor stage before liquid sweat forms
  • Derived from nature
  • Traps odors and releases them when washed and dried
  • Works for the life of the garment
  • Performs even better when layered with other 37.5® garments


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  1. 10” Light Weight VaporCore™ Crew Sock

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  8. Cutback 8.5 Mens Short

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  9. Cutback 11 Mens Short

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  10. Fusion Lt Tactical Pants

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  11. Women's Fusion LT Stretch Tactical Pants

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  12. Cutback SF Pants

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