ElectroBraid™ is a permanent electric fence designed especially for horses. It is both a physical barrier and a psychological deterrent. It is highly visible to horses, strong, durable and resilient. The high-grade polyester fiber is the same fiber used in automotive seat belts and parachute harnesses. Polyester resists attack by ultra-violet light, salt, manure and most farm chemicals. The copper develops an oxidized outer layer or 'patina' that protects the copper wire from corrosion.