Cotton Thread

The Cotton Thread is a quest item in the game Castlevania: Order of Ecclesia. They can be found inside common chests in the Monastery, Ruvas Forest, Minera Prison Island and Kalidus Channel.

Five of them must be brought to Monica to complete her first quest: Making a Dress!. She'll reward you with a Cotton Dress (DEF 7, INT 1, MND 3), and the Sequined Dress (DEF 12, INT 3, MND 7, LCK 2) will also become available in Jacob's shop for purchase.

Game Description
"A strong cotton thread. Careful how you wash it."