Pairing odd socks could become a thing of the past after the world’s first ‘smart’ sock was launched – with a built-in microchip which connects to an iPhone app.
Plus+ socks have a waterproof radio chip which records how many times the sock has been washed, how black it is, and whether it needs replacing.
Each sock is given an individual electronic identity tag, allowing the user to quickly pair up errant socks.

A spokesman for Swiss manufacturer Blacksocks said: “For socks, as in real life, only those things that go together really belong together.
“If you have ever sorted socks, you know it is not that easy to find the right and left socks that go together after the wash.”
More than 60,000 customers have already signed up to the company’s ‘sockscription’ service, which automatically posts replacement socks at regular intervals.
The Plus+ socks are available from www.blacksocks.com priced around £12. The app is free in the App Store.