SurfEars, earplugs that let sound in and keep water out. They come with changeable parts in different sizes that allow you to customize them for your ears in order to find a comfortable and secure fit.
SurfEars have close to zero acoustic loss in the frequency range of human speech while the best competitor cuts away about 20-30dB. To give you a reference, 30dB is roughly the difference between the loudest and lowest volume setting on your smartphone. That’s pretty big difference!