A multilayer composite includes adjacent filler layers having a filler material dispersed within a first polymeric matrix and an intervening-layer disposed between the adjacent filler layers. The intervening-layer comprises nanoplatelets embedded within a second polymeric matrix and are aligned substantially parallel to the adjacent filler layers. The intervening-layer is configured to fail upon application of a force to the multilayer composite that is greater than or equal to a predetermined force threshold.

A multilayer composite includes adjacent filler layers having a filler material dispersed within a first polymeric matrix and an intervening-layer disposed between the adjacent filler layers. The intervening-layer comprises nanoplatelets embedded within a second polymeric matrix and are aligned substantially parallel to the adjacent filler layers. The intervening-layer is configured to fail upon application of a force to the multilayer composite that is greater than or equal to a predetermined force threshold.

A magnetic pass-through controller of an in-helmet display includes internal components inside a helmet. The internal components include a magnet assembly holding one or more internal magnets and a swing arm affixed to the magnet assembly and affixed to the in-helmet display. External components outside the helmet include an external magnet housing holding one or more external magnets and an adjuster for manual rotation. The adjuster is coupled to the external magnet housing such that the manual rotation of the adjuster causes a corresponding rotation of the external magnet housing. Magnetic coupling between the one or more internal magnets and the one or more external magnets causes the corresponding rotation also in the magnet assembly and the swing arm.

Implementations of a ballistic helmet having an integrated electronic circuit are provided. An example ballistic helmet includes: a first armor plate attached by a hinge to a first side of the ballistic helmet, the first amor plate is configured and positioned to provide ballistic protection; a second armor plate attached by a hinge to a second side of the ballistic helmet, the second armor plate is configured and positioned to provide ballistic protection; and an integrated electronic circuit configured to operate and power electronic devices conductively coupled thereto.

Implementations of a ballistic helmet having an integrated electronic circuit are provided. An example ballistic helmet includes: a first armor plate attached by a hinge to a first side of the ballistic helmet, the first amor plate is configured and positioned to provide ballistic protection; a second armor plate attached by a hinge to a second side of the ballistic helmet, the second armor plate is configured and positioned to provide ballistic protection; and an integrated electronic circuit configured to operate and power electronic devices conductively coupled thereto.

A helmet attachment system is usable to attach a mandible or face or mouth guard. The helmet attachment system also comprises a pair of attachment bases, each arranged on a side of the helmet near to an ear covering of the helmet. The attachment bases each include a metal base plate covered by an attached body block. Each attachment base provides provisions for attaching opposite ends of a mandible to the bases. The metal base plate includes hooks for engaging an edge of the helmet. A pair of strap assemblies is provided, each strap assembly connected to one attachment base. The strap assemblies extend rearward and are connected to the back rail by a buckle member on the end of each strap assembly. The back rail includes a pair of buckle member-receiving slots. The straps assemblies and the hooks provided on the attachment bases secure the attachment bases to the helmet.

A helmet attachment system is usable to attach a mandible or face or mouth guard. The helmet attachment system also comprises a pair of attachment bases, each arranged on a side of the helmet near to an ear covering of the helmet. The attachment bases each include a metal base plate covered by an attached body block. Each attachment base provides provisions for attaching opposite ends of a mandible to the bases. The metal base plate includes hooks for engaging an edge of the helmet. A pair of strap assemblies is provided, each strap assembly connected to one attachment base. The strap assemblies extend rearward and are connected to the back rail by a buckle member on the end of each strap assembly. The back rail includes a pair of buckle member-receiving slots. The straps assemblies and the hooks provided on the attachment bases secure the attachment bases to the helmet.

A ballistic armored component attaches to the existing retention straps of common combat helmets and provides protection to the otherwise exposed lower skull and upper neck region. A fabric covering contains a soft armor or hard armor insert, and is mounted by straps or other fasteners to existing straps found in conventional helmets. The armor component may be fabric of aramid fibers, or fabric of ultra high molecular weight polyethylene fibers, or may be fabricated of a rigid plate of ceramic, polymer, or metal. The armored component adds additional protection from ground-level or subterranean munitions, by placing a ballistic shape on the lower skull region (occipital region), providing significant additional ballistic coverage with minimal weight and bulk. The fabric shell may also be connected directly to the helmet shell, to allow the component to withdraw within the helmet when the wearer's neck is flexed rearwardly.

A ballistic armored component attaches to the existing retention straps of common combat helmets and provides protection to the otherwise exposed lower skull and upper neck region. A fabric covering contains a soft armor or hard armor insert, and is mounted by straps or other fasteners to existing straps found in conventional helmets. The armor component may be fabric of aramid fibers, or fabric of ultra high molecular weight polyethylene fibers, or may be fabricated of a rigid plate of ceramic, polymer, or metal. The armored component adds additional protection from ground-level or subterranean munitions, by placing a ballistic shape on the lower skull region (occipital region), providing significant additional ballistic coverage with minimal weight and bulk. The fabric shell may also be connected directly to the helmet shell, to allow the component to withdraw within the helmet when the wearer's neck is flexed rearwardly.

In one embodiment, a protective helmet includes an outer shell and an inner liner provided within the outer shell, the liner comprising an energy absorber including a first layer, an opposed second layer, and a plurality of energy absorbing columns provided between the layers, wherein the columns include relatively long columns that are attached to both the first and second layers and relatively short columns that are attached to only one of the first and second layers.