so i have the sony xm4. They specifically are not sweat proof. They have a known problem where the ANC microphone causes a very loud feedback noise in the ear, which is because the microphone on the main speaker gets damaged by moisture. The same is true of the sony XM5 which has specific guidance about not wearing in the rain, with wet hands, while sweating etc. As my XM4 are basically unuseable (if i want to retain my hearing), i need some new over-ear headphones that will not get damaged by exercise, and came across this article. But the article seems to have been written without any reference to whether the headphones are suitable for exercise which is a bit disappointing as RTings is generally great!