PRESERVE LITTLE EARS, MUFFLE BIG NOISE - HearMuffs Sounds is hearing protection designed to block loud noise & play calming sounds to soothe your infant or toddler. They’re great for fireworks, concerts, travel, sports events & other live events. PASSIVE & ACTIVE MODE - Ideal for naptime, Passive Mode is noise reduction to block harmful sounds and protect hearing. Active Mode allows comfortable sounds in (such as a parent’s voice) while keeping harmful sounds out. SOOTHING SOUNDS - In Sound Mode, you can choose from four soothing sounds: Lullaby, White Noise, Creek, and Heartbeat. COMFORTABLE & ADJUSTABLE - Made with kid-friendly, non-toxic materials, HearMuffs are engineered for maximum comfort with smooth foam cushioning. They fit a wide range of head sizes with an adjustable GrowBand headband. IN THE BOX - Includes one pair of HearMuffs Sounds, one GrowBand, and a user manual.