: I used nylon line on my kayak, and it stretches from guitar string
: tight to sloppy when it gets wet. As I vaguely recall, someone
: mentioned that polyester line behaves better with regard to this
: problem.

: Anyone out there want to add their 2 bits worth on the stretch when
: wet issue?

: Best regards,

: Allan Edie

Only two cents worth from me, but polyester stretches less than nylon - wet or dry.
Also, using thicker line (1/4 vs 3/16 for example) will reduce the stretching problem a bit, as will pre-stretching the line before putting it on the boat.
Climbing accessory cord/line is designed to stretch (absorb impact); most of the 'yachting' aka dinghy sailing lines are low stretch- even the cheaper types.