The ring is made of stone and too large to actually be worn on a finger. It is described as having only one side, implying that it is shaped like a Möbius strip. The ring is flecked with specks of red and green.
The ring allows a person to enter Tel'aran'rhiod. Unlike other sleepweavers, which required channeling, the ring only needs to touch the person's skin to work and the use of the ring does not result in the user appearing misty, making this the strongest of the sleepweavers.