Wearable electronics have a sweat problem. Most electronic materials aren’t permeable, and if a device isn’t breathable, sweat can start to build up on the skin. That’s uncomfortable for the user, and not great for the device which could lose signal quality, or just fall off.
Read the paper here: A three-dimensional liquid diode for soft, integrated permeable electronics
Breathable electronics do exist, but the technology is in its infancy. Now though a team of researchers have developed a new breathable platform that could be easily integrated with cutting edge electronics.