Safety is a leading theme in industrial applications such as constructions sites and production chains. Several solutions are already in use to protect workers from structural failures or traumatic events. These work instruments have proven their effectiveness, lowering the potentially hurtful, if not fatal, consequences of accidents on workplaces. In this context, the Industrial Internet of Things (IIoT) paradigm can boost the development of smart wearable systems that do not impede movements and/or operations. This work proposes Smart helmet for Advanced Factory Environment (SAFE), an autonomous and integrated wearable IIoT device. With the help of integrated sensors, SAFE is able to perform continuous monitoring activities of the worker and to promptly send alerts in case of alarms and/or accidents.