Love the tabs; clever marketing ploy
The best design feature of these ear plugs is the tab so that they fit smoothly into the cartilage portion of our ears and make the plugs easy to remove. It's a clever marketing ploy to use the phrase "noise cancelling" as a generic term, not meaning the device generates counter-waves to scientifically cancel the incoming sound waves. They are passive plugs -- obstruct sound waves from entering the ear canal. There is no active noise cancellation.
Rating: 4 stars