DIFFERENCE BETWEEN
H-NAPE AND X-NAPE:
Both
H and X nape versions utilize Head-Loc adjustment tabs on the vertical
and horizontal webbing straps to provide instant tightening or
loosening of the chinstrap while wearing the helmet, but without any
loose ends. Both versions incorporate the same double-padded leather
chin cup and nape pad for greater comfort and durability.
H-Nape is intended for operators conducting rigorous activities while wearing NVDs like the PVS-15
or ANVIS9
with heavier accessories mounted to the helmet. This added weight and
subsequent CG problems could make the helmet unstable and cause it to
rotate or slip back and forth during use. When NVDs are not stable they
are difficult to see through, and when they are difficult to see
through, they are not effective. We have received reports of helmets
being so unstable that they slipped and hit users in the face, hard
enough to cause disorientation, which can be detrimental when trying to
operate a vehicle or control a canopy.
H-Nape
is extremely secure and eliminates these slipping and rotational issues
when properly tightened. The fifth adjustment point on the nape pad
allows users to instantly customize the force lines and leverage of the
horizontal straps by setting the width in the back. It effectively
cinches down on the nape of the neck, providing a vise-like grip while
still being comfortable. The system can still be loosened on the fly to
yield a more relaxed fit when desired. Most users who prefer H-Nape
want the ability to go from a relaxed fit to a 'bear trap' and don't
mind using the fifth adjustment strap to do so.
X-Nape is intended for users conducting rigorous activities while wearing lighter NVDs like the PVS-14
or having smaller equipment mounted to the helmet. Without the added
weight of heavier devices, the X-Nape provides the same security and
comfort as H-Nape and does not require the fifth adjustment point on
the back. Unlike competitor designs that require removal of the
mounting screws to set the height of the nape pad, the X-Nape version
self-adjusts to the back of the skull, resulting in a simple,
ultra-clean, low-profile system.
The
X-Nape is 2X more stable than conventional systems while the H-Nape is
3X more stable than conventional systems. This statistic comes from
repeated lab testing which measured the distance that correctly fitted
helmets moved / rotated on correctly sized head forms when various
dynamic forces were applied in multiple directions. The dynamic forces
were consistent with those resulting from walking, running, and jumping
heights while wearing PVS-14 andPVS-15
NVDs.
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