(A) Stress-strain curves of PCE at 25.0 and 36.5°C. (B) The body-temperature-driven reduction in modulus of PCE allows it to conformally contact with the wavy substrate. (C) The 90° peeling strength of PCE at 25.0 and 36.5°C respectively. (D) PCE can be adhered to different objects, such as the metallic spoon (about 5 g), plastic centrifuge tube (about 15 g), glass bottle (about 20 g), and ceramic pestle (about 25 g). (E) Heat transfer curve at the top of the claw of the PCE. (F) Skin-electrode contact impedance of the Ag/AgCl electrode, gold cup electrode, rigid state PCE and soft state PCE. (G) Variation of contact impedances of different electrodes after 48 h of wearing (@100 Hz). (H) Resistance of PCE when stretched 30% at 36.5°C. (I) Resistance of PCE when stretched for 1000 cycles at 36.5°C under 30% strain.