Abstract: A sensor apparatus adapted to be incorporated in a garment, said apparatus comprising one or more sensors, one or more fasteners to which an electronic device can be attached for receiving data from said one or more sensors, a first textile layer which in use is on the inside of the garment, a second textile layer which in use is on the outside of the garment, and a third intermediate layer provided between said first and second layer along at least a portion of said tube, wherein said first and second textile layers are made from a substantially elastic material, and said third intermediate layer is substantially more rigid than said first and second textile layers. The sensors may be ECG and respiration sensors.