Wow had no idea so many were abject to using rayon.
From a scientific point of view I like the structure of it, the attributes, the fact that its stronger than cotton, and the main selling point for ME is that unlike cotton it just *suspends* the liquid against your coil, and it only holds what it can hold, so no flooding or leaking (of course, as long as you wick correctly) ive had a tank with a genuine melo coil flood and leak everywhere overnight just sat upright on my chest of drawers, not cool.
With cotton it *absorbs* hence the slower wicking, as I understsnd its also what causes the browning from when the heat draws the liquid and sugars/sweetener/flavour back OUT of the cotton also degrading the structure cotton at a molecular level, hindering its ability to re absorb more liquid.
Don't get me wrong cotton is improving: densitys, longer, more fit for purpose strands, and unbleached no pesticides etc.
I dont have anything against it per sae, its being made by vapers for vapers and so on now.
As we all know vaping is VERY subjective but after going through the best brands of cotton and finding no real discernable difference apart from price - and then researching rayon quite a bit before trying it.... Unless they make some sort of completely flavourless super cotton that matches rayon on a scientific performance level I cant ever see myself going back.