Smart wearables are changing the way we monitor human activities and behaviour as they provide hands- free access
to technology. They are undoubtedly making our life easier by providing wide array of applications in daily lives. These devices
are an indispensable part of the Internet of things (IoT). This paper discusses the latest trends and innovations of IoT-enabled
smart wearable devices. It also addresses user requirements of wearable technology. The basic components of smart wearables
consist of sensors, microcontrollers, cloud platforms, User Interface (UI), connectivity and gateway. In the literature study
section, we have given a summary of the innovative papers that are divided into three major domains of wearable technology i.e.
i) safety and tracking, ii) medical, and iii) sports and fitness. Further various limitations and challenges of wearable sensor
devices are also discussed. This paper is useful to get an in-depth explanation about smart wearables and to know hardware and
software components
