Kickstarter reports: [edited]
Isolate blocks sound from entering your ears, including bass frequencies, without any batteries.
Traditional ear plugs and defenders cannot block low frequencies from entering your ears. They make sound muffled, leaving you feeling disconnected.
With Isolate ear plugs, noise is blocked by a dense material suspended in soft memory foam to isolate it from the effects of conduction. The result is total direct noise isolation for your ears without any electronics.
Kickstarter Pledge: from £23