Sun protection could be about to get a whole lot easier thanks to L'Oréal, which has unveiled the first-ever stretchable skin sensor designed to monitor UV exposure.

"My UV Patch," revealed at the Consumer Electronics Show (CES) in Las Vegas, aims to help consumers educate themselves about sun protection by changing colour when the wearer is exposed to strong UV rays.

The patch is a transparent adhesive measuring about one square inch, containing photosensitive dyes that factor in the baseline skin tone of its user and the strength of the UV rays being experienced. It has a thickness of 50 micrometers and can be stretched and applied to any area of the skin.

Users can take photos of the patch and upload them to the corresponding La Roche-Posay My UV Patch mobile app, which analyses the varying photosensitive dye squares to determine the amount of UV exposure the wearer has received.

The app will be available on both iOS and Android, incorporating Near Field Communications (NFC)-enabled technology into the patch-scanning process for Android.

The patch is being released by the group's dermatological skincare brand La Roche-Posay and is expected to be made available to consumers later this year.

Until it is available, it is advisable that you not skimp on the traditional sunscreen nonetheless. Read our guide on how to pick the best one.