Ropes with dyneema
or polypropylene cores don't soak up water
, and are lighter to begin with. Not popular on cruising boats because of the cost and the lack of stretch. Racing
boats use them exclusively, but an accidental gybe puts a lot of shock load on the fittings.
You can use a short piece of nylon strop in the system to absorb shocks, and then go with the thinnest dyneema
cored rope that your hands find comfortable.
My comfort range is between 3/8" and 3/4"--any sizes out of that get hard to handle. But a 3/8" dyneema mainsheet might just do the trick.