SFS Standard Face in the Crowd Feat 1

Source Player Core pg. 220
Prerequisites trained in Deception
You know how to get lost in a crowd. You can use cover from crowds to Hide and Sneak, gaining a +2 circumstance bonus to your Stealth checks when in a crowd of at least 10 creatures and a +4 circumstance bonus to your Stealth checks when in a crowd of at least 100 creatures. Hidden creatures don't count as members of a crowd. If you're a master in Deception you only need 5 creatures to get these bonuses.

Traits

General:A type of feat that any character can select, regardless of ancestry and class, as long as they meet the prerequisites. You can select a feat with this trait when your class grants a general feat.
Skill:A general feat with the skill trait improves your skills and their actions or gives you new actions for a skill. A feat with this trait can be selected when a class grants a skill feat or general feat. Archetype feats with the skill trait can be selected in place of a skill feat if you have that archetype's dedication feat.