The Tigrex armor is made mostly of Tigrex materials, along with some rare ores, monster bone+ and some Killer Beetles. The armor offers high raw defense and a moderately balanced resistance to the elements. It's obtainable in 5* elder village quests and in 5* (HR3) Gathering Hall quests. The helmet can be a pain in the neck to obtain due to the skull shell you need for it, but the armor is worth it. It is a good armor set for later low-rank quests and even some earlier high-rank quests