The Hylian Shield is a defensive item found in The Legend of Zelda: Ocarina of Time, The Legend of Zelda: Twilight Princess, and The Legend of Zelda: Breath of the Wild ,as well as in the Super Smash Bros. video games. Similar shields have appeared in The Legend of Zelda: Majora's Mask, The Legend of Zelda: The Wind Waker and The Legend of Zelda: A Link to the Past.
The Hylian Shield is known as being one of the most highly recognizable shields in the series. It has been masterfully crafted and features an emblem of the Triforce in the middle, the red Loftwing below it, and various other designs that distinguish it from other shields. Because of the material its made of, it can withstand fire, unlike combustible wooden shields in the series.
In Ocarina of Time, it's actually not the most powerful shield, with that title going to the Mirror Shield, which is better primarily for its ability to reflect light. It has been said that the shield is so powerful due to magic that surrounds it, though this cannot be confirmed.