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Standard nylon or “cave” line.
This ^^Everbilt #18 x 250 ft. Pink Braided Nylon Mason Twine-73296 - The Home Depot
250' for $5.50, works well. Used a lot in a local lake, ran lines in case of a silt out, it's a long story. The pink was the easiest to see in silted conditions. Years later it still holds a boltsnap on the hose where I put it.
Bob
This ^^
You don't want dacron or polyester. You want #24 braided nylon. I get mine from Memphis net and twine but mason's line is the same stuff (usually colored)