This is a simple mod (which was made within 24 hours). It adds bonuses to the player when he/she is wearing a full set (helmet, chestplate, leggings, and boots) of one type of armor. This mod also adds 2 new items. These are leather strips, and Iron Chain Links. These new items allow the player to craft chainmail armor.
Full Set Bonuses
Diamond: Adds access to new achievements
Iron: Grants the wearer level one resistance and slowness effects.
Gold: Grants the wearer level one haste, but always gives the players position away with the glow effect.
Chainmail: Grants the wearer level one resistance, but occasionally gives it's position away with a *clink* noise.
Leather: grants the wearer level one speed.
3 leather placed in center row of the crafting table = 9 Leather Strips
9 Leather Strips = 2 Leather
A leather strip surrounded by 4 Iron Nuggets = 1 Iron Chain Link
Chainmail armor is crafted the same as iron armor, but uses Iron Chain Links instead of ingots