It's called customgothic and it seems to be a proprietary font, as written here
http://www.dafont.com/forum/read/14810/hollister-font-please-help-me?highlight=44349#44349Identified font: Custom Gothic
Edited on Sep 13, 2012 at 19:56 by drf_
I just checked the CSS, it's used for the top menu, and it's indeed Custom Gothic.

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