Uncorded earplugs for smaller ears are made of nonflammable, dermatologically safe foam. PVC foam is nonirritating. Slow-recovery, low-pressure foam conforms to the shape of the ear canal for enhanced comfort and wearability. Moisture-resistance helps maintain a consistent expansion time, even in humid environments. NRR 29-decibel earplugs are 7 percent smaller than the 3M Classic earplug (and the same length) to fit comfortably in smaller ears. They are also tested to ANSI S3.19-1974.
