Iron Boots

The Iron Boots are recurring items in the Zelda series.

Uses
The Iron Boots can be equipped to make Link extremely heavy, enabling him to walk along lake bottoms, force his way through tough wind currents, and walk along walls and ceilings using magnetic forces.

Ocarina of Time
The Iron Boots can be found in the Ice Cavern near Zora's Fountain. When equipped, they make Link walk very slowly due to their extreme weight, but he can go at the bottom of lakes and other sources of water. Link must wear the Zora Tunic in order to stay underwater; otherwise, a timer will appear and, if he does not take off the boots and re-surface before time runs out, he will drown. They are required to traverse through the deep water in the Water Temple, and are also useful in the Shadow Temple, as they enable Link to walk against the fan currents.

In, the Iron Boots were changed from equipment to an item, simplifying their use.

The Wind Waker
The Iron Boots are found inside a cave in the Ice Ring Isle. Link can use the Iron Boots to avoid being flown away by the wind, making them required for the Wind Temple. They also allow him to activate springboards by wearing the boots and then taking them off. Additionally, wearing the Iron Boots and using the Hookshot on some statues allows Link to pull them down. Although the Iron Boots typically cause Link to sink to the bottom of water when wearing them, in The Wind Waker they will immediately un-equip when Link begins to swim.

The Iron Boots are an item assignable to X, Y, or Z, which makes taking them on and off a lot easier than in Ocarina of Time.

Twilight Princess
The Iron Boots are found in Mayor Bo's house in Ordon Village after defeating him in a Sumo match. Similar to The Wind Waker, they are an item assignable to specific buttons. They are used to ward off the Gorons on the way up Death Mountain, and to defeat Gor Coron and Fyrus.

The Iron Boots also allow Link to walk on magnetic roofs and walls in Goron Mines. They are also required to complete the Lakebed Temple, as they allow Link to use Water Bombs while underwater. In the City in the Sky, they can be used similarly to the Iron Boots in The Wind Waker to hold Link steady in strong gusts of wind. Link can also roll with them on and hurt enemies.

Trivia

 * A pair of boots called the Water Boots were set to appear in The Wind Waker. They were either a beta version of the Iron Boots or a seperate version which would allow Link to sink underwater.