Sun-smart wristband and other gadgets on show in London
18 March 2014 Last updated at 11:27 GMT
The UK's first Wearable Technology Show is being held in west London with the latest inventions from Google, Intel, Reebok and F1's McLaren.
Developers and technology companies are investing billions in the industry, all vying to develop the next big thing.
Gadgets on show include the usual smartwatches and wristbands, but also a smart sports jacket and even a locket - as business reporter Caroline Hepker demonstrates.