3M™E-A-Rsoft™ FX™ earplugs feature a bell shape and super-soft, slow-recovery foam to effectively seal the earcanal and provide reliable hearing protection Benefits •Poly bag keeps each pair of earplugs clean before use •Bell shape allows easy insertion and removal. •Noise Reduction Rating (NRR)* 33 dB. CSA Class AL. •Test compatible with 3M™ E-A-Rfit™ Validation System.