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What Is It?
What Does It Do?
How do I use it?
Fitting tip: A plug that is cooler in temperature will retain its compressed shape and rigidity slightly longer, sometimes making it easier to insert. Sometimes when you try a number of times to insert a plug it can warm up to body temperature and be more difficult to work with. A sign that the earplug is sealing properly is that your own voice will sound more internal and exaggerated.
If you are looking for a plug that can also act as an earplug for water protection, have a look at the Mack's Pillow Soft Silicone Earplugs– note however that these do not carry as high a NRR as the Ultra Plugs.