“…Moreover, incorrect and/or uncomfortable skin contact may arise due to the stiff nature of some of the proposed base materials (aluminium, [3] steel, [11,12] silicon, [13,14] titanium, [15] and polycarbonate [16] ), and designspecific conceptual problems (micro-needle electrodes [13,14] and rigid planar plates/disks unable to interfuse the hair layer [15,16] ). Hence, in order to reduce some of the referred drawbacks, several authors focused not only on the development of new electrode designs, which allow an effective hair interfusion, [17][18][19][20] but also on the use of more compliant base materials, such as textiles [21] and, above all, flexible polymers. [22][23][24][25] Thermoplastic polyurethanes (TPU) have been extensively applied in several fields that range from technical coatings to biomedical applications, [26][27][28] due to their excellent balance between mechanical properties (high flexibility, dependent on the composition), chemical barrier behavior, soft tact, and biocompatibility, [29,30] thus being appropriate to be used as biopotential electrode base material.…”