This RP4 White Heel Rope is a 100% nylon four-strand rope that offers a consistent feel. From Running "P" Ropes.
The Titan 4-Strand Heel Rope from Lone Star Ropes is a nylon/poly blend with a larger than average diameter. This calf rope has huge amounts of body and insane tip control!
The Callaway Accelerator is a three-strand head rope with the weight of a larger diameter rope, but in a smaller size well suited for small horns.