The Classic Plus earplug offers comfortable hearing protection to your entire workforce! Soft, expandable foam provides excellent attenuation and a great fit. E-A-R trademark bright yellow color for quick compliance checks. Available uncorded. 200 pair per box. Tested in accordance with ANSI S3.19 standard.  NRR 33.  Slow recovery PVC foam provides comfort with low pressure. Dermatologically safe foam is not irritating. Flame retardant - critical for storage considerations. A proven performer for almost 25 years. Moisture resistant. Will not absorb moisture and swell. Foam will maintain its comfort, fit and critical recovery characteristics. Shape equalizes pressure throughout the ear canal as it expands; prevents shifting and keeps effectiveness of noise seal constant.