Abstract: Wearable sensors hold great promise in emerging fields such as health monitoring, human–machine interfaces, and bioinspired electronic skin. Developing breathable sensors with high sensitivity, mechanical flexibility, and structural recoverability is therefore of critical importance. Herein, we report a porous, wearable sensor based on an Ecoflex–graphene composite, fabricated via an electric field-assisted melt deposition technique using microscale, water-soluble sacrificial templates. By precisely tuning the microstructural parameters of the template—including linewidth, spacing, and intersection angle—a quantitative structure–performance relationship was established. The sensor exhibits excellent sensitivity, cyclic stability, and inherent breathability. When applied to human motion monitoring, it enables accurate detection of gripping force, finger and wrist articulation, and laryngeal movement, highlighting its strong potential for next-generation flexible electronics and motion recognition systems.