To project your hearing, earplugs are essential for your protection. But sometimes you need to hear and typical earplugs block too much. The X-Pro is comfortably in your ear, and you can activate the hearing protection with the push of a button. The closed valve will now protect your hearing by giving you 29 dB SNR with the foam tips (19 dB SNR with silicone tips). When you need to hear again, simply press the button again to open the acoustic valve, allowing sound to pass through naturally.