Swelter Material

{{Infobox set }}
 * name = Swelter Material
 * source = o
 * type = h
 * cargo = f
 * setsize = 8
 * setbonus = 75
 * loco = Swelter
 * lococost = gems
 * car1 = Swelter Wolfram
 * car1src = b
 * car1type = wolf
 * car2 = Swelter Borax
 * car2src = b
 * car2type = bora
 * car3 = Swelter Bismuth
 * car3src = b
 * car3type = bism
 * car4 = Swelter Xenon
 * car4src = b
 * car4type = xeno
 * car5 = Swelter Wolfram S+
 * car5src = b
 * car5type = wolf
 * car6 = Swelter Xenon S++
 * car6src = b
 * car6type = xeno
 * notes = {{SO|2018|8||cat}} (Locomotive} Rewarded from:
 * (Wagons)