Initial draft:

Name: Champion's Rune
Traits: Evocation, Magical, Transmutation, Rare
Level: 7
Cost: ? (doesn't really matter as this is given as a boon by the respective churches)
Effect: This rune is only applied to armor of Champions of the gods to serve their deities more efficiently and without needless time loss and distraction. The armor melds to the wearer almost as a second skin, letting them rest inside the armor as if it had the Comfort trait.
The rune also makes the armor constantly affected by a Prestidigitation spell that keeps the inside of the armor at a comfortable temperature for the wearer as long as the environment's temperature isn't hazardous. This gives the wearer a 1 circumstance bonus on saving throws against spells and effects with the fire and cold traits.
The Prestidigitation effect also cleans any soils on the armor and the wearer from sweat, blood and the like over the course of a minute of them happening. This also gives the wearer a 1 circumstance bonus on flat checks against ongoing damage from acid.
Lastly, the armor gives off a faint smell associated with the respective deity, giving a 1 circumstance bonus on diplomacy rolls against followers of the deity and creatures associated with it as long as those creatures are within 10ft. range when the check is performed and also a 1 circumstance bonus against spells and effects with the olfactory trait.

I wanted to do something nice for my party's champion and had him get an armor at his church that I loosely described as "very comfortable" and "you don't feel the desert heat anymore" and now I wanted to put it into rules text. However I haven't found any basic runes that grant the comfort trait and I'm a bit worried this singular rune does a bit too much. I could easily remove the saving throw bonuses if they're too over the top. What does everyone think?

Edit: Updated text after feedback from here:

Name: Champion's
Traits: Evocation, Magical, Transmutation, Rare
Level: 9
Cost: ? (doesn't really matter as this is given as a boon by the respective churches)
Effect: This rune is only applied to armor of Champions of the gods to serve their deities more efficiently and without needless time loss and distraction. The armor melds to the wearer almost as a second skin, letting them rest inside the armor as if it had the Comfort trait.
The rune also makes the armor constantly affected by a Prestidigitation spell that keeps the inside of the armor at a comfortable temperature for the wearer as long as the environment's temperature isn't hazardous.
The Prestidigitation effect also cleans any soils on the armor and the wearer from sweat, blood and the like over the course of a minute of them happening. This reduces the DC of flat checks against ongoing damage from acid by 1.
Lastly, the armor gives off a faint smell associated with the respective deity which can be picked up in close proximity to the armor (10ft. radius for normal humans) giving a 1 circumstance bonus on diplomacy rolls against followers of the deity and creatures associated with it as long as those creatures have smelled this in the last 10 minutes. This effect also grants a 1 circumstance bonus against spells and effects with the olfactory trait.
This rune is rendered inert if the armor is not worn by the person it was initially applied for. Selling, throwing away or otherwise voluntarily letting go of the rune, or the armor it is attached to, is anathema to your deity.