The Forest Dweller's Shield is an item in The Legend of Zelda: Breath of the Wild. It a wooden Shield made by Koroks for Hylians and has an base defense of 30, though this may be increased by certain weapon bonuses. It is the strongest wooden shield in Breath of the Wild in both terms of base defense and durability, though like all wooden shields it will burn if exposed to fire or volcanic temperatures. However it doesn't attract electricity and Link can use it to collect Arrows fired by enemies by guarding. One spawns with a Forest Dweller's Spear behind some of the Great Deku Tree's roots in Korok Forest which will occasionally respawn when Link returns to the area.
Related Side Quest
Another one is granting by Chio when Link accept one of the Korok Trials side quests at the Korok Forest in the Great Hyrule Forest region which Link must carry with him throughout the trial and not let it burn or break.