While wearing this ring, you have resistance to cold damage. In addition, you and everything you wear and carry are unharmed by temperatures as low as -50 degrees Fahrenheit.
Ring of Warmth in the 2024 rules
The 2024 Dungeon Master’s Guide revised the magic items, and the SRD 5.2 carries the new text. What changed:
Same rarity and attunement; the text is reworded for the 2024 rules glossary.
Type
Ring
Rarity
Uncommon
Attunement
Required
If you take Cold damage while wearing this ring, the ring reduces the damage you take by 2d8.
In addition, while wearing this ring, you and everything you wear and carry are unharmed by temperatures of 0 degrees Fahrenheit or lower.