Zeta II Helmet Liner 18 5/8

The Zeta III Helmet Liner for the HGU-56P was designed for maximum comfort, protection, and helmet stability. Self-wicking outer fabric dissipates perspiration keeping your head cooler and drier. The Zeta III is easy to fit, install, maintain, and is equally effective while wearing Night Vision or other externally mounted equipment. The Zeta III has an upgraded foam core and offers the same level of comfort and performance as the original ZetaLiner® Helmet Liner.

Choosing the Right Zeta III Liner for your Helmet

The Zeta III is available in 3 different thicknesses for each helmet size. The thickness you need is determined by the number of layers in your existing Thermoplastic(TPL®) Liner.

NOTE: If your TPL(Thermo Plastic Liner) has been heated and fitted, you will probably need a Zeta III Helmet Liner one thickness thinner than listed below.

If your TPL® Liner Has...	...Then try a
2-3 Layers	3/8" Liner
4-5 Layers	1/2" Liner
5+ Layers	5/8" Liner

Easy Installation and Care

Your Oregon Aero Zeta III Helmet Liner is installed in 4 easy steps using hook/loop fastener strips. Complete instructions are included with the liner. See Documents section for instructions.

Cleaning Instructions: Hand wash your Zeta III with mild soap and rinse thoroughly. To dry, place your helmet liner flat on a large towel. Fold the towel over to cover liner. Use a rolling pin or similar object to squeegee out the excess water. Do not wring liner. Re-Shape your helmet liner and allow it to air dry in a warm place or in front of a fan. Do Not Use Any Artificial Heat Source to Dry. Unless conditions are humid, your liner should dry overnight.

Note: Wringing your Zeta III or drying it with an artifical heat source will damage the liner. Use recommended methods of care only.

The Oregon Aero® Zeta III® Helmet Liner being installed in a Military HGU-56P Aviation Helmet.