Are there waterproof jackets that can actually stand up to heavy rain?

[btfc]

For what intended use?

Stuff made for sailing might work:

https://www.gillmarine.com/mens-os2-offs...ket-os25j/

Remember, the more waterproof the fabric, the more important venting is.

Perhaps just a newer version of what you have.


Or:

https://www.nikwax.com/en-us/