Leaf Armor provides little protection from cannibal and mutant attacks. However, it does grant you a boost to stealth when crouching. Stealth could be useful to hide from large groups of cannibals and patrols, but unfortunately, stealth is not implemented very well in the game. Cannibals are not stupid. They will easily spot you even if you're hiding in a bush, dressed as a bush. (Seems legit...) No other armor type provides stealth, so Leaf Armor has a unique selling point; however, because of the awful stealth system in Sons of the Forest, you're much better off wearing stronger armor when you're inevitably found camping in a bush. You can mix and match your armor to equip two or three pieces of Leaf Armor, Tech Armor, or Creepy Armor. This may make a difference when you want to sneak past enemies; don't count on Leaf Armor to keep you hidden. You're much better off using the Red or Gold Mask to deceive the cannibals and sneak past them than Leaf Armor.