In the long run, toxic gases and particulate matter are considered to be dangerous to human health long before visible symptoms can be felt. In dealing with this silent but real danger, we came up with Toxic Alert, a small, portable gadget, mounted inconspicuously on any clothing, which measures the composition of the ambient atmosphere, evaluates the vital signs parameters, and gives relevant warnings in case of the detection of poisonous gases. Its simplistic design makes it user-friendly, practical protection in real life.