The fabrication process began with the preparation of PDMS strips, as shown in fig. S1C. Initially, molds were printed using polylactic acid via an FDM 3D printer. Subsequently, uncured PDMS (Sylgard 184, Dow Corning) was poured into the inner grooves of the mold to create the restraining strips, with a thickness of 0.5 mm. Following the curing of the PDMS, uncured Ecoflex 00-30 was poured into the mold. After a waiting period of 4 hours, the Ecoflex 00-30 was cured, resulting in the merging of the stretchable substrate (Ecoflex 00-30) and the restraining strips (PDMS).