A ZetaLiner® Helmet Liner (see above) GSA Schedule #GS-07F-5489R

Testing shows transmitted impact loads were reduced 25-35% in a helmet equipped with ZetaLiner® or Zeta II™ Helmet Liner and SoftSeal/HushKit® Combo ear seals and insulation kit, compared to the original helmet. Visco-elastic foam sewn into cool, washable wear-resistant fabric. Eliminates top-of-head hot spots. Self-wicking fabric controls heat buildup by evaporative cooling of perspiration. Eliminates "bob and roll" when mounting external equipment. Lighter weight than other liners. Fitting only takes a few minutes. Testing shows these helmet Liner reduces skin temperature 1.5°F compared to existing liner systems.

Specifically for the HGU-56, the PM Air Warrior Approved Zeta II™ Helmet Liner offers the same benefits as the original ZetaLiner® Helmet Liner. Fitting only takes a few minutes!

See ZetaLiner® & Zeta II™ Helmet Liner fitting and ZetaLiner® & Zeta II™ Helmet Liner selection information and product listing.

Order Guide for ZetaLiner & Zeta II Helmet Liners 

B SoftSeal® Ear Cushions (see above) GSA Schedule #GS-07F-5489R

Conform to your head and eyewear. 200-300% more volume for total comfort. Temperature and pressure sensitive, two-part visco-elastic foam core. Smooth, soft, washable synthetic leather coverings. Flange and/or adhesive mounting for plastic Ear Cup, depending on applications. Original ear seals are replaced with the SoftSeal® Ear Cushions. 


Click Here to see the SoftSeal® Ear Cushions product listing.

Order Guide for SoftSeal Ear Cushions

C SoftSkin® Ear Seal Covers (see above) GSA Schedule #GS-07F-5489R

Keep your ears even drier and cooler and add to product life by slipping SoftSkin® Ear Seal Covers over SoftSeal® Ear Cushions. Self-wicking reduces perspiration buildup. Especially helpful in hot, humid climates. They fit loose, not tight like a drum (this is important because tight cloth covers produce pressure on the ear, causing pain). Choose for 3/4" or 1-1/8" thick SoftSeal® Ear Cushions.

Click Here for more information and product listing.

SoftSkin Order Guide

D HushKit® Passive Ear Cup Noise Attenuation Kit (see above)
GSA Schedule #GS-07F-5489R

Testing shows HushKit® Passive Ear Cup Noise Attenuation Kit performs better in the 700-7000Hz mid-range where hearing loss occurs. Dramatically improves noise attenuation and intelligibility. Four die-cut visco-elastic foam layers fill all Ear Cup voids. Turn down your radio volume! It’s not that you can’t hear your radio (even though it’s on high volume) — it’s that you can’t understand what’s being said in the voice mid-range.

Click Here for more information and product listing.

HushKit Order Guide

E MicMuff® Microphone Cover (see above) GSA Schedule #GS-07F-5489R

The MicMuff® Microphone Cover lets a noise canceling mic do its job above 97dB. Eliminates ambient cockpit noise and noise from radios and intercom. The noisier the cockpit (warbirds, open cockpit, large engine aircraft), the more dramatic the improvement in noise reduction and clarity. See explanation of how it works. MicMuff® Microphone Cover must be used on all helmets installed in the communications system. Soft, washable leatherette cover over foam sleeve creates chamber around mic. Cockpit noise has limited access to mic cartridges, but voice enters easily through holes in leatherette cover. Elasticized tie ensures it won’t blow away.

Click Here for more information and product listing.

MicMuff Order Guide