"A helmet made from ancient techniques and electricity-resistant material. It's made from something called "rubber," a material that can no longer be found."
The Rubber Helm is a helm found in Breath of the Wild. It has a base defense of 3 and provides a resistance to electric damage. It sports a black and yellow aesthetic, in a shape reminiscent of a fish. It is obtained by completing the Thunder Magnet side-quest at the Lakeside Stable.