Elixir
With Elixir Strings, the coating acts as a physical barrier between the string and its
damaging environment. Elixir Strings is the only brand to coat the entire string –
protecting not only the outer string surface, but also the gaps between the windings.
Result: Elixir Strings players report their tone lasts longer than any other string –
uncoated or coated.
 
Ultra-thin NANOWEB Coating...
* Bright and lively tone *Feels more like traditional strings
Smooth feel with less nger squeak *Extend tone life
Veelahs’ V3 V5 V56 V57 V58 V6 are all equipped with the
Naoweb Strings!
http://www.elixirstrings.com/guitar-makers.html