The Zeta II fitting system is manufactured in several thicknesses, ranging from 1/4 (size 2) to 5/8 (size 5) inches thick, in one-eight (1/8) inch increments.
  - Improved padding over original ZetaLiner Systems
    - Impact loads are reduced 25-35% in a helmet equipped 
  with the ZetaLiner Helmet Liner and Combo ear seals   and insulation kit, compared to the original helmet.    - Eliminates top-of-head hot spots.
    - Selfwicking fabric controls heat buildup
    - Eliminates "bob and roll" when mounting external equipment.
    - Availabe in thickness sizes of 1/4", 3/8", 1/2", and 5/8".
    - Fits the HGU 56P Helmet.
       |