eptfe microporous waterproof film is a new kind of polymer microporous waterproof material, made of ptfe resin through a special process, can produce 0.01~0.25mm thick microporous waterproof film, for smartwatch deepwater protection, generally choose eptfe microporous waterproof film is a new kind of polymer microporous waterproof material, Made of ptfe resin through a special process, can be made of 0.01~0.25mm thick microporous waterproof film, for smart watch deep water protection, generally choose 0.01mm~0.03mm thickness, thin, waterproof and breathable pressure relief, at the same time thin and can vibrate sound permeability, but also breathable sound permeability. In this way, the smartwatch is waterproof, breathable and sound-permeable.01mm~0.03mm thick, thin and thin, waterproof, breathable and pressure relief, and thin and vibration-permeable and sound-permeable. Thus, the smartwatch is waterproof, breathable and sound permeable.