As consumers rely more and more on portable electronic products such as smartphones and smart watches, voice recognition has become an increasingly important part of the user experience. These devices must resist sweat, rain and splashes while keeping sound clear at the openings — the pressure difference and condensation inside the housing, together with the acoustic loss caused by microphone and speaker openings, have become two core conflicts in structural design. ePTFE microporous membranes solve both at once: the pores let gas through while blocking liquid water, and by opening purpose they fall into two solution types — "waterproof venting" and "acoustic venting".

Selection can be made according to the device protection rating, opening size and acoustic specifications, with adhesive lamination, die-cut forming and production-line placement process support available.