Type: General
Source: Dragon #335
You can hold your breath much longer than normal.
Prerequisite: Con 16.
Benefit: You can hold your breath or double the normal number of rounds before you risk drowning. For example, a human with this feat can hold his breath for a number of rounds equal to four times his Constitution score before he risks drowning.
Normal: A human can normally only hold his breath for a number of rounds equal to two times his Constitution score before he risks drowning.