Bet you've heard me recommend one
P-line Floroclear is a co-polymer line with a fluorocarbon coating, and comes in clear or mist green.
It is not the best casting line, slightly stiff. I find knots need to be regularly checked, and the mainline to hooklink swivel knot cut and retied frequently.
Big advantage is it is almost invisible underwater, when I first (didn't) saw it years ago at 5 Lakes, a hooklink was in a tank of water with a gravel bed. The line was invisible, but I could see the hook and swivel.