Zeta III™ Overview/Sizing HGU-56P
Choosing the Right Zeta III Liner for your Helmet
The following table will help you determine which size Zeta III is right 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.
Choosing your Zeta III Liner Thickness
|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|
Once you have determined the thickness you need, choose the Zeta III that matches your helmet size below.
The sizing charts on this page are intended to suggest a starting point for the fitting process. Each individual should be fitted for best comfort and stability. Results may differ from the data shown here. Oregon Aero is committed to helping you select the proper Zeta III Helmet Liner for your helmet. If you have any questions call us at 800-888-6910.
Zeta III Size Table for Military HGU-56P(Click the part number# to order)
|For Extra-Extra-Small(XXS) Helmets|
|3/8" Thick||#9A-0043-102||NSN n/a|
|1/2" Thick||#9A-0043-103||NSN n/a|
|5/8" Thick||#9A-0043-104||NSN n/a|
|For Extra-Small/Small(XS/S) Helmets|
|3/8" Thick||#9A-0038-102||NSN n/a|
|1/2" Thick||#9A-0038-103||NSN n/a|
|5/8" Thick||#9A-0038-104||NSN n/a|
|For Medium(M) Helmets|
|3/8" Thick||#9A-0039-102||NSN n/a|
|1/2" Thick||#9A-0039-103||NSN n/a|
|5/8" Thick||#9A-0039-104||NSN n/a|
|For Large(L) Helmets|
|3/8" Thick||#9A-0040-102||NSN n/a|
|1/2" Thick||#9A-0040-103||NSN n/a|
|5/8" Thick||#9A-0040-104||NSN n/a|
|For Extra-Large(XL) Helmets|
|3/8" Thick||#9A-0041-102||NSN n/a|
|1/2" Thick||#9A-0041-103||NSN n/a|
|5/8" Thick||#9A-0041-104||NSN n/a|
Easy Installation and Care
Your Oregon Aero Zeta III Helmet Liner is installed in 4 easy steps using hook/loop fastner strips. Complete instructions are included with the liner. If you would like to see how easy the Zeta III Helmet Liner is to install you can Click here to download installation instructions in PDF format.
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 fat. 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.