The mic can be detached from the headset. Once you attach the mic into the port you can only bend the mic towards your mouth and shouldn’t twist from the socket bc it’s fixed into the port and doesn’t swing but it does bend towards your face/mouth.
The material of the headphones is leather like, not sure it’s real leather but real leather has a particular odor I’m familiar with and I didn’t smell leather upon opening package, which is when the odor would be strongest.