The conductor is covered with a soft composite silicone elastomer and then covered with fine woven mesh. The 25AWG * 4 strand.     

More copper and less silver design which makes the monocrystalline copper thick and natural in middle and low frequencies and the 

monocrystalline copper-plated silver in high frequencies. Integrated into a well-balanced sense of hearing. 

Especially when used on large earmuffs-type earphones.  The vivid of the note are shown completely.