3M E-A-R Express 311-1115 corded earplugs - NRR 25 (100 Pairs) Kidde while the 2291 has no

while the 2291 has no odor media at all

not a tested insulating tool

For non-wired rooms

or paint fumes — use the 3M 2097 or 3M 2297 for nuisance organic vapor odor

The 3M 1100 carries a laboratory Noise Reduction Rating (NRR) of 29 dB

3M E-A-R Express 311-1115 corded earplugs - NRR 25 (100 Pairs) Kidde while the 2291 has noEDITORIAL REVIEW: 4. 5 5 WC Safety Review 3M E A R Express 311 1115 Corded Earplugs NRR 25 The 3M E A R Express 311 1115 corded earplugs covered on this page is reviewed here against its published specification and the standard that governs its category, not against a marketing claim. It is also listed as NRR 25 corded earplugs, 3M pod earplugs, no roll foam earplugs. Editorial assessment by Steven Eaton, WC Safety editor, based on published 3M