Advancements in wearable and integrated sensing devices have given tremendous opportunities to enable advanced remote applications including sensing, monitoring, and tracking systems and states. Accordingly, wearable systems can be utilized to provide social and economic well-being for individuals by assisting them in the performance of their daily duties and for organizations by keeping their employees anytime, anywhere connected and by enhancing their productivity. However, wearable devices are, mainly, wireless in nature, which make them exposed to several types of security attacks that may threaten the life of individuals and the security of organizations. This chapter brings a comprehensive study on the benefits of wearable technologies and their related security and privacy issues, discusses the major policies that can be used to mitigate the risk posed by wearable technologies and the proposed techniques to assist users' safety in hazardous workplaces; and discusses the digital investigation of security incidents on wearable technologies.