A system of fibre based temperature sensor integrated into abase fabric layer for a garment, the system comprising: a set of wall fibres interlaced with one another to form a first wall structure defining a first cavity along a length and a second wall structure defining a second cavity along the length, the set of wall fibres comprising nonconductive material; at least one conductive fibre miming along the length within each cavity, such that the set of wall fibres of the wall structures encloses each at least one conductive fibre in order to electrically insulate each at least one conductive fibre from an environment along the length external to the cavities; and a set of base fibres interlaced with one another to form the base fabric layer.