 The proposed bio-inspired multi-functional magnetic hydrogel has the potential to be used in smart wearable devices due to its unique combination of features such as stretchability, self-healing, biocompatibility, and customizable shape. It also possesses excellent EMI shielding capabilities and can be remotely controlled using an external magnetic field. Furthermore, it is capable of monitoring body motions and can be used as a strain sensor. This article was authored by Biao Zhao, Zhong Nibai, Huayang LD, and others.