A ring of warmth were magical rings that protected their wearer against the effects of extremely cold temperatures. A creature attuned to and wearing a ring of warmth was not bothered by ambient temperatures as low as −50 ℉ (−46 ℃) with no need for cold weather gear or clothing. In addition, any items carried or worn by the wearer were also immune to those low temperatures, making them ideal for traversal in high mountains or low depths.
The rings also offered considerable protection against magical cold, greatly reducing any damage taken by the wearer from a cold source or Spell.