Thunder Resistance +25

4 armor sets give this skill. Wear every piece in a row to get it. "Any" means that part does not count.

Head	Chest	Arms	Waist	Legs	Skills
Hi-Metal Helm+	Ioprey Mail	Hi-Metal Vambraces+	Ioprey Tasset	Gypceros Greaves	Stun Duration Halved, Water Resistance -10, Thunder Resistance +25 (male)
Hi-Metal Cap+	Ioprey Vest	Hi-Metal Guards+	Ioprey Coat	Gypceros Leggings	Stun Duration Halved, Water Resistance -10, Thunder Resistance +25 (male)
Hi-Metal Helm+	Ioprey Mail	Hi-Metal Vambraces+	Gypceros Tasset	Ioprey Greaves	Stun Duration Halved, Water Resistance -10, Thunder Resistance +25 (female)
Hi-Metal Cap+	Ioprey Vest	Hi-Metal Guards+	Gypceros Coat	Silver Boots	Stun Duration Halved, Water Resistance -10, Thunder Resistance +25 (female)