We’ve been using these gore-tex vents in our custom boards for years now. Installed properly, they let air pass through, but not water, allowing air pressure in the board to equalize with the atmosphere.
Vents are manufactured to a high standard by WL Gore. Installation can vary from board to board and it’s up to each builder to work out their own installation. The housing is installed into the board much like traditional screw-in vent housing. The difference is, when installing the vent you need to use a 9/32” socket instead of a screwdriver. Once in place they are strong and safe. WL Gore suggests that these are lifetime vents, never needing replacing. We do recommend keeping them clear of wax and sand and rinsing them from time to time with fresh water.
Warning- These vents are fragile before they are installed and are a little trickier to install than the screw-in variety. Use care and caution when installing and be sure the socket you use is fully engaged on the vent and that the o-ring on the vent is compressed onto the housing.