Before you determine what material is best for your anchor line, think about where you. If you will be setting the anchor in sand or mud, you can use nylon or braided polyester line. Both are easier on the boat and its gear than solid chain and they stretch so your boat won.
Nylon is resistant to rot and mildew but can be damaged by rust from iron fittings or anchor chain.
It should be stored out of direct sunlight to prevent ultraviolet deterioration. Braided nylon resists chafe better than three-strand because its surface is smoother, with more fibers to absorb the wear. Carry a length of anchor line that is about 10 times the depth of water where you normally anchor. If you intend to anchor for a long time you should pay out more rode than if you are staying only for lunch. For most coastal waters, about 200 feet of nylon should suffice for 98 percent of your anchoring situations, but check the depths in your sailing area.