A wearable jacket includes a 2D-DST substrate shaped to cover a body of a
subject person. The 2D-DST substrate includes a first conductive sheet, a
second conductive sheet and a plurality of communication modules. The
first and second conductive sheets are overlapped, and the first
conductive sheet is located on the subject person side when in use. The
plurality of communication modules are distributed between the first and
second conductive sheets. At least one of the plurality of communication
modules has a communicating system capable of communicating with an
external device by receiving and/or transmitting a spatially propagating
signal. One of the first and second conductive sheets on the external
device side is formed with an area that allows the spatially propagating
signal to pass through at a position corresponding to a location of a
communication module having the communicating system.