Move Silently

Move Silently (Dex;Armor Check Penalty)

Description
The Move Silently skill is used once the Sneak feat is activated. A sneaking character can be detected with a successful Listen check. Enemies that hear you may show a red question mark above their head, and then walk over to the noise's source. To escape detection, you'll need to be more quiet and move away from the enemy.

Note that when sneaking your Hide skill is of great importance, too. For more on the overall mechanics, revised with Update 19, see the Sneak article.

In contrast, an invisible creature is now effectively immune from Spot checks if greater than 2 meters (a human body length). However, invisibility does not grant silent movement. While running or walking (not in Sneak) an invisible player has a Move Silently check of zero and can be easily detected.

Move Silently (Dex)
 * Class Skill for a Bard, Monk, Ranger, Rogue