I have tried the harness that places them on your chest but didn't really care for them, they always seemed in the way and I was beating up my binos pretty bad climbing trees etc.. I agree with the under the arm placement but followed a tip I got from a old Alan Altizer video which is to use a longer strap and have them right around your hip, they can be slid around very easily either behind you to get them out of the way or brought up for viewing.. have used this method for a lot of years.