When researching tactical gear you will run across garments (clothes) claiming to be NIR Compliant.
What does that imply?
NIR stands for Close to InfraRed. It is the wavelength of light from 780 nm to 2500 nm. It is not visible with the naked eye.
But, it is visible with many sorts of evening vision devices (NVDs), which includes tactical evening vision goggles (NVGs).
NVGs function on the amplification of ambient light (Image Intensification or Itwo technologies)- but can use Close to Infrared light also.
It is significant to note that Image Intensification devices are diverse than thermal vision devices.
Thermal vision devices use the distinction in temperatures of objects and their backgrounds to supply a view in the dark (or daytime!). “NIR Compliant” gear will not defend against your actual heat signature.
NIR compliant gear minimizes NIR reflected light – not the emission of thermal (hear) IR!
If you are attempting to obscure your heat signature – wrap oneself in a space blanket, mylar blanket – or other blanket intended to “preserve physique heat.”
NIR compliant gear will lessen your Close to IR (Infra-red) signature and break up your patten on these wavelengths. Feel of it as IR camouflage.
NIR compliant uniforms and garments use a specific fabric blend that will not reflect IR and UV light – or at least it will lessen the quantity reflected.
Here’s a quite informative video that has some true reside examples. You need to watch it (This is not my video – but is embedded by way of YouTube.)
How is this magic achieved?
Particular fabrics, patterns, and dyes in some circumstances.
Fabrics employed in NIR compliant gear incorporate Nyco, Rayon/Nylon blends, and Nomex.
Nyco is a 50% CORDURA nylon / 50% Cotton composition fabric.
Mil-spec CORDURA 1000D or 500D are NIR compliant. CORDURA is created with Nylon.
Polyester and Poly/Cotton blends are NOT employed in NIR compliant gear.
Polyester is quite IR reflective.
With regards to dyes, you have heard of “UV Brighteners” in your customer detergents?
Feel of these as anti-UV brighteners.
American Dye Supply inc sells “near infrared absorption dyes.”
NIR compliant gear can need specific care – for instance, do not use a detergent with UV or colour enhancers.
Lastly, some patterns have been created from the start out to lessen close to-IR – for instance Crye Precision, creators of the MultiCam camo pattern claim:
“The MultiCam® pattern was created to correctly limit the visual and close to-IR signature of a individual operating across a quite wide variety of physical environments and seasons.”
But, they provide small detail on how close to-IR signature is really decreased. Presumably, it is either by way of NIR compliant fabrics such as Nyco or specific dyes employed in the pattern on the fabric.
Examples of some NIR compliant gear incorporate:
- Propper ACU Coat and Trouser – An genuine military uniform authorized for active duty by the U.S. Army.
- Propper ABU (Airman Battle Uniform)
- Propper CWU 27/P NOMEX FLIGHT SUIT – In Tan or “Freedom Green” – not in Black
Propper – Manufacturer of numerous US military uniform products
Tech specs on CORDURA fabric.
Lots of fascinating information on NIR compliance (or lack thereof)
NIR Dyes from American Dye Supply Inc.