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I'd say this kinda defeats the low-viz properties of fluoro for some undetermined advantage. Right now it's a marketing hook and I'd bet it doesn't last more than two seasons.
Well if they used fluro to encapsulate the braid, it’ll shed water like floro, with the no stretch and thinner diameter of braid. But it sounds like it’s braid wrapped around floro just to add density and make it uniformly round. Still looking for the perfect line for lake trout fishing out outside in below freezing temps. I rarely set up my shack.
Ahhhhh... thing is the braid is still there on the outside pickin' up water. Uniformly round? Just choose a solid braid product that is coated to resist water pickup. This will not last. Trust me.
Pefect line would be something like seaguar abrazix/invizix with a nanofil core. Something in a 4-6lb mono diameter equivalent, at about 10lb test, in 125-300yd spools. I can’t stand the 50yd pony spools, our lake trout are found 100ft and deeper.