There are 3 common clothes hanging rope types.
Basic plastic clothesline has the advantage of being waterproof and cleanable (you can wipe off the inevitable mildew). With wire and fiber reinforcement, it is stretch-resistant—and it’s cheap. You can find a 100-foot roll for less than $4. However, it is thin, which means that it will be harder for you to grip, and the clothespin is not going to hold as tightly as on a thicker line.
Multifilament polypropylene (nylon) is tempting because it is lightweight, water- and mildew-resistant, and strong (our sample was 640-pound test). However, its slippery texture deters a firm clothespin grip, and it doesn’t tie well.
Our top choice is basic cotton clothesline. It’s about the same price as nylon, which is about $7 to $8 per 100 feet. In theory, it is weaker (only 280-pound test in our sample), but unless you’re hanging out pots and pans to dry, it should hold up fine.