You can’t always have your coach by your side, which is where the NURVV Run Smart Shoe Insole comes in. This insole and tracker set works with GPS and a connected mobile app to provide you with important information about your technique. In fact, you can even get information during your run that’ll help you improve as you go. This smart running insole will tell you your cadence, gait, step length, and stride. So if there’s something you need to correct, you can do so before developing an injury. What’s more, the NURVV Run will tell you details like your pronation and foot strike once you’ve completed your training. Available in sizes for men and women ranging from 5 to 15.5—including half sizes—this smart insole fits everyone.