This article was first published in the May 2016 issue of WIRED magazine. Be the first to read WIRED's articles in print before they're posted online, and get your hands on loads of additional content by subscribing online.
Spring is here - and when temperatures rise, so do sales figures for Ansell, one of the world's biggest condom manufacturers. It's the name behind the mates line in the UK, lifestyles in the us and Australia, Kamasutra in India, Manix in France and Blowtex in Brazil.
To keep up with global demand, five million condoms slide off factory lines every day - hopefully never to slip off anything else again. In the latest in our toolkit series, WIRED takes a look at what they go through to ensure they're up to the job.