Tribal Armor is one of three kinds of armor from the Hexxit Gear mod and is made with Hexical Diamonds. When fully equipped, the player gets infinite Strength, Night Vision and Jump Boost III potion effects.
It may be important to remember that Jump boost does not negate fall damage. Therefore a Feather Fall enchantment on the boots is highly recommended (Else you may receive more fall damage than expected).
There is a bug with Dimensional Doors where you can't see anything except some particles while you have Night Vision. Therefore, if you enter a dimension added by that mod, it is a good idea to not wear the full set.