OMsignal have released a number of mens shirts able to measure heart-rate, breathing-rate and breathing volume. A small electronic pod (see photo below) is clipped to the shirt and this gathers the data and sends it, via bluetooth, to a smartphone for analysis, visualisation and advice. Looking at the garment in the photos the band containing the electrodes and stretch sensor (for breathing measurement) is visible. My guess is that this will have to be reasonably tight to get good measurements and wonder if it would feel somewhat constraining if worn for long periods.
Adidas has a training shirt for men which has some similarities to the OMsignal offering, such as fabric heart-rate monitoring and wireless data transfer, but it does lack the breathing sensor and is intended for sports use, rather than to be worn all day.
OMsignal pod
Source: Digital trends