Thicker shocks make the glasses fit tighter as they prevent the arms from opening quite as far. You can also mix different sizes to further fine tune the fit - all my x-metals have size 15 one side and 25 on the other...Can anyone provide info on temple shocks? Do the thicker shocks mean the glasses will fit tighter on the head? My infinite hero Juliets were a little loose fitting. Would like this new pair to be more snug.