The itty-bitty wearable could save you from skin cancer.

By Faith Brar
Updated: January 16, 2018
Photo: L'Oréal

The most important mantra in any skin-care regimen is sunscreen, sunscreen, sunscreen. But even if you're in the habit of slathering on SPF every time you step out the door, there's no way of really telling how much UV/UVA you're being exposed to-until now. Thanks to L'Oréal, you'll soon be able to monitor your exposure to the harmful rays with the help of a new battery-free wearable UV sensor.

"L'Oréal research shows that overexposure to UV rays is a top health and beauty concern of consumers worldwide," Guive Balooch, global vice president of L'Oréal's Technology Incubator, said in a press release. "With this knowledge, we set out to create something that blends problem-solving technology with human-centered design to reach even more consumers who require additional information about their UV exposure."

Dubbed UV Sense, the small sensor is the first of its kind and is built to determine how long you've been outside and alert you when your UV exposure is too high. It does so through an accompanying app that receives data directly from the sensor and prompts you to either get out of the sun or apply more sunscreen to better protect your skin. (Did you know that Ultraviolet Radiation Causes Skin Damage-Even When You're Indoors?)

Obviously, the amount of sun each person can handle varies, which is why the app asks you some initial questions about your skin before setting a baseline. Based on that, it will also recommend products (including sunscreens) that are best suited for you-and it'll give you pointers on how to properly take care of your skin as well as the effects harmful UV rays can have on it.

The $50 device will come with replaceable adhesives so you can stick on to your fresh new mani or on other items like your Fitbit or sunglasses.

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