while the Ag NPs endowed the material with opportune electrical conductivity as well as excellent antibacterial properties that resembled those of natural skin. Generally electrical conductivity is provided in hybrid hydrogels by metal NPs, although graphene nanosheets, , PEDOT or PPy NPs can play this role. In the latter example, material resistance increased proportionally to the strain applied, due to the greater separation between the conductive units, resulting in a clear strain sensitivity, even for values as low as 1%. Conductivity could also arise from the high content of water in the hydrogel network. This was observed with a hybrid material made of PAA and PAAm-grafted core-shell silica NPs (SiO2-g-PAAm). The robust network of dynamic hydrogen bonds made the hydrogel highly responsive to strain and pressure. When placed on the neck, this allowed to monitor word pronunciation by sensing throat movements linked to swallowing saliva during each syllable.