The silly jester boots are part of the Silly jester costume, which is obtained and used during The Fremennik Isles quest. They offer the second highest Magic defence bonus of any pair of boots, tied with infinity boots, pegasian boots and boots of brimstone, and only beaten by the eternal boots.

If a player were to lose their Silly jester boots, they can get them back by searching the king's chest on Jatizso.