Swamp boots

The swamp lands of Britannia are very dangerous. Everyone walking through them risks to get poisoned, which means a slow and painful death for the victim. Since a red Potion or a Cure spell aren't always available, these boots were developed for travelers and adventurers. With Swamp Boots, it is totally harmless to stand in the poisonus waters of a swamp, as long as no other parts of the body touch it. Swamp Boots protect from the poisons in the water, and the poisonus slugs that live in this water. Therefore, every adventurer should have one pair of Swamp Boots ready, as they are a gurantee that the life will last a lot longer in the swamps.

History
In Ultima VI, VII and VII/2, Swamp Boots were something totally normal, and could be brought for a small price at almost every armoury or tool shop. In Ultima IX however, they were strangely enough treated like a special thing, and only one pair was seen in the entire game.

Trivia

 * The concept was fucked up in Ultima IX. There, the Avatar could even swim in the poisonus water with Swamp Boots (why this is idiotic, should be clear).