The emerging wearable technology craze has spread…to socks. Crazy idea? Well, not really, when you dig deeper. Sure, they act as an ultra-precise step tracker. However, with multiple sensors in the sock communicating to your smartphone via an anklet, they can help warn people who are excessively heal-striking. This might even be of some use to barefoot runners (few of which run truly barefoot, so they’d be used to wearing socks already), though barefoot runners instinctively avoid heal striking already. It can also monitor your cadence and notify you of changes needed to meet goals there.