You have an incredibly soft step, making it difficult to track or hear you.
Prerequisites: Elf, Dex 13, Balance 2 ranks, Move Silently 2 ranks.
Benefit: You can walk without leaving behind any but the most subtle marks. The Survival DC to track you increases by 5 (or by 10 if you move at half speed to hide your trail; see the Track feat).
You ignore any penalties on your Move Silently checks incurred by noisy or very noisy terrain (see the Move Silently skill description).
Source: Races of the Wild, page 151.