Remarkable Athlete

At 7th level, you gain proficiency in the Athletics skill. If you are already proficient in it, you gain proficiency in one of the following skills of your choice: Acrobatics, Animal Handling, Intimidation, or Survival.

Your proficiency bonus is doubled for any ability check you make that uses Athletics. You receive this benefit regardless of the skill proficiency you gain from this feature.

In addition, you can add your proficiency bonus to both the number of minutes you can hold your breath and the number of rounds you can survive without breath.