The picture shows Jeff aboard Sailors Run producing a baggy wrinkle.
Traditionally made from cast off manila line, Jeff has a new wrinkle (pun intended) He uses poly propylene line. This line is bright yellow as you can see and adds a colorful splash to the rigging after installed.
He was using 3/4 inch 3 strand line chopped into 5 inch lengths and then pulled apart for the process of weaving it into a pair of foundation lines made from heavy nylon twine. His was 'tarred' which should add life to the assembly. Each 5 inch section once dissasebled and then wove provided about 5 inches on what would become a 5 foot lenth. Then it is wound around the rigging and tied in place to stay for years to protect the sails from chafe. Jeff provided a demonstration for us and several others. He learned from an old cruisers many years ago and is paying it forward.