Surfer ear- Irritation from cold wind and water exposure causes the bone surrounding the ear canal to develop lumps of new bony growth which constrict the ear canal. The condition is so named due to its prevalence among cold water surfers. Warm water surfers are also at risk for exostosis due to the evaporative cooling caused by wind and the presence of water in the ear canal. The condition is not limited to surfing/Stand up paddle boarding and can occur in any activity with cold, wet, windy conditions such as windsurfing, kayaking, sailing, jet skiing, kitesurfing, and diving. Let the sound in. Keep the water out. SurfEars have a acoustic mesh that lets sound in but keep water out. This with a tuned core replicates the natural resonance of the ear, gives a clear natural sound PROVEN PERFORMANCE let's so much sound through it's easy to forget you're wearing ear protection. Independent tests show that SurfEars have far superior performance compared to similar products on the market. SurfEars show 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 a pretty big difference in performance! SurfEars come with a fitting options for a custom fit.