Burch, Chad is right, nylon is the foundation that many of us have used. It has "served" us well, for many years!
I still use it today. Not the toughest or slickest serving made, but very affordable for the beginner and veteran!
At anytime, if needed, you can reserve and be shootin again, with little cost and many colors available.
Then you can experiment with other types to find your preferd material!
You can use any for tied on nocks, whether it be nylon, dacron, fast flight etc. for that purpose!
Good twistintg to ya!