You can disguise your footfalls so that they are harder to detect.

Prerequisite(s): Light Step

Benefit: The special quality tremorsense does not work against you. Thus, a purple worm cannot detect you simply because you are moving within 60 ft. of it. The creature must instead detect you through normal means. In addition, you gain a +2 bonus to your Stealth checks. This bonus stacks with that from the feat Light Step and any other feat that grants a similar bonus (such as Stealthy).