A wearable patch capable of wireless communications includes an elastic layer, an adhesive layer under the elastic layer, and a shearable electrode layer that includes: a support substrate comprising one or more openings so positioned to allow the shearable electrode layer to be sheared and elongated, and breathable, an upper electrode layer on the support substrate, and a lower electrode layer under the support substrate. The support substrate can include a via that is conductively connected to the upper electrode layer and the lower electrode layer. The lower electrode can be in contact with a user's body and to pick up electric signals from the user's body.