Well most of them Nylon are the Florescent colors so it's not really one or the other, it's the color you want. For example the FL Pink is not like the Pink Rayon so if it's a shade of color you like then just get it as it will not come in both!

For my money Nylon is better, but most colors just come in Rayon! You need to go to Danville and look at their color chars!

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