3M Platinum Uncorded Earplugs - Poly Bag Box 200 The 3M E-A-R Classic Platinum Earplugs combine economy with reliable hearing protection in a slightly smaller diameter that fits comfortably in smaller ear canals. These earplugs are stiff enough when compressed to make fitting easy, yet soft enough to be comfortable in the ear for extended wear. These earplugs have a SLC 80 rating of 23 dB (Class 4). These earplugs are test compatible with the 3M? E-A-Rfit? Validation System. Moisture resistance helps maintain a consistent expansion time, even when humidity is present. Flame resistance helps protect against potential arc flash situations and provides for safer storage. Features Slow recovery, low pressure foam fits snugly to create a noise barrier that helps protect hearing from high level sounds Bright yellow color allows supervisors to conduct a quick visual hearing protection compliance check