If you're using rebuildable coils in your RDA, RTA, or RDTA device, you'll need vape cotton for making your wicks. Cotton wicks are designed for use with rebuildable atomisers. Vape cotton is for use with rebuildable vape coils, used when making your own DIY coils in RDA vape tanks or RTA vape tanks.
We also love the Cotton Gods wicks by Gods of Vapers. These organic cotton wicks are designed for vaping at high temperatures without giving dry hits.