Patent ID: 8307942

Claim:
A flat earplug comprising: A flat, rectangular foam sheet of one layer of open cell foam material having a first surface and a second surface and a first end that is rolled up upon itself to form a coiled earplug of contiguous coils for blocking sound form entering a user's ear; Wherein the coiled earplug includes an inner most coil that is compressed to form a rigid axial core when the first end of the foam sheet is rolled upon itself to form the coiled earplug; and Successively contiguous outer coils that immediately surround the innermost coil, the outer coils being compressible before and expandable after the coiled earplug is inserted into the user's ear, to retain the earplug in the user's ear, wherein either the first or second surface has a skin thereon, and wherein the skin has at least one of a smooth, a semi-adhesive, or an adhesive texture.