3M™ E-A-R™ Classic™ Platinum™ Uncorded, Poly Bag 310-4003 - 23dB (Class 4) (Box of 200 Pairs)3M E A R Classic Platinum Uncorded Earplugs are one of the industrys first foam earplugs, virtually revolutionising hearing protection. The soft, roll down foam of these earplugs conforms to the unique shape of each ear canal to provide a low pressure, comfortable seal. These earplugs have a smooth texture for in ear comfort and are made of an advanced foam formulation for outstanding softness. These earplugs have a SLC 80 rating of 23 dB (Class 4).