The Seawreath is a craftable Item exclusive to Don't Starve Together and introduced in Return of Them. It requires 12 Kelp Fronds to craft and is equipped in the head slot. While worn, it lowers Sanity by 1.33 per minute. It will spoil over time. It's effective for nightmare farming or traversing the Lunar Island, as when on the island sanity translates to lunacy. Wearing this will help combat high levels of Enlightenment.