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Gentex X Liner

Improves comfort and performances to ensure mission endurance

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The X Liner® is Gentex’s most advanced helmet liner, designed specifically for simple field installation, removal, and replacement. The revolutionary lightweight comfort system uses a unique bi-layer, temperature insensitive material, and easily adjustable design for the ultimate in fit and comfort even during prolonged missions or in extreme climates—the X Liner achieves nearly 50% more heat transfer than similar products. The X Liner is the only product of its kind that is fully tested and approved by Gentex for use in the Gentex HGU-55/P, HGU-68/P, HGU-84/P, and PM HALO Fixed Wing Aircrew Helmet Systems meeting all military impact test requirements.


  • Incorporates an anti-microbial fabric designed to inhibit the growth of odor-causing bacteria and fungi, and reduce electro-static discharge.
  • Specifically designed for simple field installation and for use in all Gentex flight helmets.
  • Minimizes the problems of heat build-up, liner “roll” and “creep” inside helmets.
  • Available in two comfort thicknesses: 1⁄2 inch and 3⁄4 inch.
  • Fully hand washable.
  • Easily custom-fitted to head before placing in helmet, maximizing individual comfort.
  • Does not become hard in cold climates or too soft in hot climates.
  • Unique design offers nearly 50% greater heat transfer resulting in cooler and more comfortable wear.

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