This is "constant weight" freediving in Dahab (Egypt),in the famous "blue hole"<br />During the "triple depth" competition (every year in Dahab)<br /><br />for more information: <a class="link" rel="nofollow" href="http://www.tripledepth.com/">http://www.tripledepth.com/</a><br /><br /><a class="link" rel="nofollow" href="http://www.blueholeproject.com/">http://www.blueholeproject.com/</a>
