Power Wrapper wire vs Polywire?
Polywire or Hotwire has been around for a very long time. It is made with 5 Polyethylene strands plus 3 x stainless steel wires twisted together and then 3 of these are twisted again. Making polywire stronger than wrapper wire because of the twisting, but the twisting puts the stainless-steel wire throughout the twist and therefore not on the surface to ensure the current is felt.
The wrapper wire has all the polyethylene through the centre, with 2 sets of 3 wires wrapping around the outside. Meaning the breaking strain is not as good as the polywire but the exposed wires do the job of delivering the current when needed. This makes it perfect for any animal with a longer coat.