CUTTING-EDGE TECHNOLOGY Engage Plus earplugs are the result of extensive research & development, combining an innovative acoustic channel and a newly-engineered filter for more engaging conversations. LOW-LEVEL NOISE REDUCTION Like other Loop products, Engage Plus qualify as Certified Hearing Protection. Engage provides low-level protection, meaning they block out the excess sound without affecting the things you need to hear (like your own voice). They have a noise reduction rating (SNR) of 16 with an additional 5 dB available on demand with Mute. ECHO-FREE SPEECH Engage Plus address a challenge frequently faced by regular earplug wearers: that echoey, head-underwater feeling known as 'occlusion'. Engage Plus earplugs limit the occlusion effect, helping you interact with others more freely. PERFECT FIT All earplugs are designed with both style and maximum comfort in mind. Every set comes with ear tips in 4 sizes: XS, S, M & L to help you find the perfect fit. Also included are 1 Carry Case, a set of Mute and extra foam ear tips. If your earplugs feel tight or uncomfortable, try a size smaller. If they dont reduce noise sufficiently, try going a size up.