3M™ E-A-R™ Push-Ins Foam Earplug, Polyurethan, Blue/Yellow, Corded (MMM3181001) 100 PairsNo roll down Earplugs Plus, since the the unique foam actually softens and becomes more pliable with body temperature, the seal and comfort increases the longer the plugs are worn The patented E A Rform foam tip is shaped and sized to mold comfortably to fit virtually every sized canal Noise Reduction Rate (NRR) = 28 dB Body Color = Yellow Type = Corded Packing Type = Poly Bag CSA Class AL