Terrain Stalker Level 1
Prerequisites: trained in Stealth
Select one type of difficult terrain from the following list: rubble, snow, or underbrush. While Undetected by all non-allies in that type of terrain, you can Sneak without attempting a Stealth check as long as you move no more than 5 feet and do not move within 10 feet of an enemy at any point during your movement. This also allows you to automatically approach creatures to within 15 feet while Avoiding Notice during exploration as long as they aren't actively Searching or on guard.
Special You can select this feat multiple times. Each time, choose a different type of terrain.
Source: Core Rulebook