I don’t know the definitive answer to this, but I suspect you will be ok, because high humidity / sweat is different than total immersion that IP ratings deal with. The “socks” like Ear Gear or others might be an extra safeguard in that use. I’m very familiar with IP ratings from working in the rain with electronics that need to be protected from immersion or direct heavy rain.
On another note, with my Costco ReSound Forte 8, I tried some $350 Bose over the ear noise cancelling headphones for getting better music, and with open, tulip, and power domes, I get horrendous feedback, and gave up on the idea after 30 minutes of attempts with various domes. I returned them the next day, and still searching for something that give me better music listening with the HAs. I’m fine with podcasts, but the music is too 1960s transistor radio sound for me to accept.