The World's Only Earplugs That Let Sound In, Developed by Surfer. SurfEars 3.0 are the world's only earplugs that protect your ears from water, cold, dirt, and bacteria without affecting your hearing, and help prevent surfer's ear (exostosis). They are designed to block water while allowing sound in, using a specially developed proprietary acoustic mesh. Comes with interchangeable parts in various sizes, allowing you to customize for a comfortable and secure fit that suits you. Suitable for surfing, swimming, whitewater kayaking, diving, wakeboarding, and other water activities. ■About SURF EARS https://drive.google.com/file/d/1YJGPc1zg26d3NCQX3c1x7IULbTNINRL3/view?usp=sharing ■How to Replace and Care for SURF EARS Parts https://drive.google.com/file/d/1NINIlEpTTu_VR2OJwleJqNWRpokfyMRO/view?usp=sharing ■SURF EARS FAQ https://drive.google.com/file/d/17oFeNbyCm4zhq8uFgimiMn4c-EfRBgOt/view?usp=sharing