Nephalem = Larger head sizes.
Unique patented flap adjustment for full skull cover at the back,
with the TFC tag/pocket hidden inside the cap (Silver side visible).
Still fits inside standard caps but especially designed to fit our
unique Carbon Stealth caps which have full skull cover at the back.
More Info EMF/Scaler Energy
Metal fiber exposed to air/moisture cannot avoid oxidation,
therefore the fabric can show signs of dis-coloring (Patina)
this is normal but it does not affect the Radiation Shielding function