A wearable monitoring device comprising a printed circuit board having a first side and a second side opposite the first side, wherein the printed circuit board is configured to couple to at least one sensor configured to monitor a physiological condition； at least a first padding layer coupled to the printed circuit board proximate the first side； at least a second padding layer coupled to the printed circuit board proximate the second side； a first protective layer coupled to the first padding layer opposite the printed circuit board； a second protective layer coupled to the second padding layer opposite the printed circuit board； at least one additional layer between the first protective layer opposite the printed circuit board； the first protective layer and the second protective layer seal together and enclose the first and second padding and the printed circuit board； and a power source coupled to the printed circuit board.
