Minecraft wiki entry for Player_versus_Player, associated text: Leather armor The weakest armor, full leather armor will shield you for up to 28% of damage taken. If anyone has full leather armor, the thing that they will likely be able to get(and because risk of death is high), is an iron sword because leather is just about as easy to farm as iron is to find. If you ambush them with an iron/stone sword, you should be able to get about 2 or 3 critical hits in most cases. Each critical hit should be able to do 7.