PRESENTED BY
PRESENTED BY
These are independent reviews of the products mentioned, but TIME receives a commission when purchases are made through affiliate links at no additional cost to the purchaser.

Heart disease is the leading cause of death among firefighters, in large part because of their extended exposure to high-heat situations, a problem that also affects industrial workers and members of the military. SlateSafety aims to solve this problem with the BioTrac Band ($495), a wearable tracking device that watches for signs of heat stress. Worn on the arm, the device measures each user’s heart rate, core body temperature and exertion, pinging a cloud-based platform to alert commanders and colleagues when those measures hit unsafe levels. Since its inception, the company has been awarded $1 million by the National Science Foundation and has received three contracts from the Department of Defense; the device is now used by 35 fire departments and the U.S. Army, Navy and Air Force. —Abhishyant Kidangoor

More Must-Reads from TIME

Contact us at letters@time.com.

EDIT POST