Glass Ring of Preservation

are items in.

Location and Uses
NaN Glass Ring of Preservations are items that prevents all other equipment from losing durability, allowing its wearer to use limited-use items indefinitely but only as long as the ring is equipped. However, like all glass items, the ring will break as soon as its wearer takes damage, forcing the heroes to tread carefully around hazards and enemies in order to keep it intact.

They can be bought from a CoH: or found as loot from red NaN Treasure Chests.