I started having a major sweat problem shortly after I graduated high school.  I would wait until right when I walked out the door to put my shirt on because I knew I would immediately begin to pit out.  I decided to try Certain Dri and I stopped sweating after the first day of use.  After using it dayly for a week you only need to use it every couple of days (or just whenever you remember!).  I have not pitted out any of my shirts in over a year and it's… read full review »