Monofilament only where absolutely needed. Combines the naturalness of a monotop with the affordability of a machine made cap. A MonoEssentials™ Part is a hand-tied monofilament at the critical part area. A MonoEssentials™ Crown is a small section (usually between 1-2 inches) of hand-tied monofilament in the critical crown for natural appearance. aka Mono-Part or Mono-Crown.