Feature soft, slow-recovery foam for extreme comfort and outstanding noise reduction to protect your hearing. They are easy to roll down and insert, and they expand slowly for a low-pressure fit.  The bell Shape offers versatility and a comfortable fit for a larger range of individual ear canals. Conveniently packaged in individual polybags. Made in USA. Meets ANSI S3.19-1974 standards. NRR 33 dB.