Whatever combination of socks and shoes you plan to use for swimrun, ensure you test them thoroughly in advance. That means testing them when they are wet
As swimmers we don’t need to think about socks too much, except perhaps for how quickly they might warm our numb toes after a swim, but if you’re taking on a swimrun, what comes between your skin and your trainers is worth careful consideration. Getting it wrong could result in a painful, race-ending experience.