An excellent alternative to disposable earplugs. Molded from extra soft PVC, one size fits most users. An extra long tab makes the RD1 easy to insert and remove. Hygienically safe, no rolling or squeezing required. To aid it its safe and proper application, this earplug also comes complete with an inserter. Instant fit, no holding or waiting. CSA Class A(L). NRR: 24dB.