Cotton yarn

Cotton Yarn is a members-only item on the OSRS Grand Exchange in the other category.

In-game examine text: "Spun from cotton bolls."

It has a Grand Exchange buy limit of 13,000 every four hours, a high alchemy value of 72 gp, and item ID 31469.

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Cotton Yarn shows an active flip setup with a margin of +11 gp and 141,698 trades over the last 24 hours.

At the buy limit of 13,000 every four hours, max profit per cycle is about 143.0k gp — high margin with healthy liquidity.