3m e-a-rsoft yellow neon blasts foam earplugs, corded, 311-1252, 200 pairs 3m e-a-rsoft yellow neon blasts corded earplugs seal the earcanal with soft, slow-recovery foam for excellent noise reduction and comfort.these corded foam earplugs offer a soft, low-pressure solution with a exciting flame graphics – poly bag keeps earplugs clean and accessible for re-use. – regular size fits most earcanals. – noise reduction rating (nrr)*: 33 db. Csa class al. * test compatible with 3m e-a-rfit validation system.