When it introduced layered armor in Monster Hunter: World's Iceborne expansion, it was an entirely separate process from crafting regular armor. Stuff was locked behind enough quests and mountains of required materials that, in the end, I gave up and stuck to some set I grabbed during an event quest.

Surprisingly, despite being something that you’d think would come in a hotter climate, the Hot Pepper is only found in the Iceshard Cliffs. This is one of the few ingredients that this affects, but because most of the Iceblight enemies come from the Iceshard Cliffs, it only makes sense that you could get the ingredients here to cure it.