Mack's are terrific for sleeping with moderate noise levels and reducing wind noise when biking (they work great under a helmet

After extensive testing and customer feedback we’ve simplified the range of sizes to Standard and Large

changeable tone and volume

“We conducted a range of tests on Calmer and found it to significantly reduce sound levels at middle to high frequencies (2 kHz – 8 kHz)

The filters operate like valves and ensure gradual and constant pressure equilibrium between the external environment and the middle ear

Macks Dreamweaver Contoured Sleep Mask w/ Ear Plugs Noise Cancelling Mack's are terrific for sleepingMacks Dreamweaver Contoured Sleep Masks feature a contoured design which allows complete freedom to open and shut the eyes, while keeping the wearer comfortable inside a curtain of darkness. Made of silky smooth material, Mack's Dreamweaver Sleep Mask is so light and slim, you'll hardly know you're wearing it. Features dual elastic straps with adjustable tensioners for optimum performance and comfort. Great for air travel, daytime sleep, or catching a