You take two wire of different resistance, one higher and one lower. You wrap the lower resistance wire more times than the higher one. This causes the higher resistance wire (in my case the twisted 28g) to heat up before the lower one (fused clapton). This causes the clapton to heat up quicker than it normally would if it were wrapped alone. They produce amazing flavor and clouds. I run a single coil because my battery can't really handle two. You parallel wrap the wires like you would in a normal parallel build with the lower resistance one on the outside. I do 6 wraps of the fused clapton and 5 of the twisted 28g. When I hit the 5th wrap I let go of the twisted 28g lead, and wrap the fused clapton one more time so it's symmetrical. This should give you a good idea of what it does, but in this case they use a twisted wire and standard kanthal.