A method of integrating an interposer device with a textile layer, the method comprising the steps of: providing a textile layer comprising a plurality of yarns, at least one of which is an electrically conductive yarn; providing a stretchable interposer device comprising a stretchable electrically conductive structure with at least one contact pad (11, 51, 102) for establishing at least one electrically conductive path towards an electrically conductive yarn of the textile layer; positioning the interposer device such that at least one of its contact pads (11, 51, 102) is aligned with at least one of the electrically conductive yarns of the textile layer, thereby defining at least one contacting location between the interposer device and the textile layer; mechanically attaching the interposer device to the textile layer; and establishing an electrical contact between the at least one contact pad (11, 51, 102) and the at least one electrically conductive yarn at the at least one contacting location after the step of mechanically attaching the interposer device to the textile layer by: locally removing, by laser ablation at the at least one contacting location, electrically insulating materials present between the at least one contact pad (11, 51, 102) and the at least one electrically conductive yarn, and providing an electrically conductive material at the at least one contacting location so that an electrically conductive contact is formed between the respective contact pad (11, 51, 102) and the respective electrically conductive yarn. providing a textile layer comprising a plurality of yarns, at least one of which is an electrically conductive yarn; providing a stretchable interposer device comprising a stretchable electrically conductive structure with at least one contact pad (11, 51, 102) for establishing at least one electrically conductive path towards an electrically conductive yarn of the textile layer; positioning the interposer device such that at least one of its contact pads (11, 51, 102) is aligned with at least one of the electrically conductive yarns of the textile layer, thereby defining at least one contacting location between the interposer device and the textile layer; mechanically attaching the interposer device to the textile layer; and establishing an electrical contact between the at least one contact pad (11, 51, 102) and the at least one electrically conductive yarn at the at least one contacting location after the step of mechanically attaching the interposer device to the textile layer by: locally removing, by laser ablation at the at least one contacting location, electrically insulating materials present between the at least one contact pad (11, 51, 102) and the at least one electrically conductive yarn, and providing an electrically conductive material at the at least one contacting location so that an electrically conductive contact is formed between the respective contact pad (11, 51, 102) and the respective electrically conductive yarn. locally removing, by laser ablation at the at least one contacting location, electrically insulating materials present between the at least one contact pad (11, 51, 102) and the at least one electrically conductive yarn, and providing an electrically conductive material at the at least one contacting location so that an electrically conductive contact is formed between the respective contact pad (11, 51, 102) and the respective electrically conductive yarn.