3M 1110 UF foam ear plugs (corded version of the 3M 1100 ear plugs) are the stiffest of the poly-urethane foam ear plugs. For those who like the feel of UF, but want the stiffness of PVC (which makes insertion easier)
3M 1100 Foam Ear Plug Individually Wrapped Uncorded, 29 dB Noise
3M E.A.R. Soft Fx 3M E.A.R. Plugs Es-01020 (Pack of 200)
3M 1110 Corded Foam Ear Plugs (100 Pack)
Box - 3M™ Soft Foam Corded Earplugs 1130 (100 Pairs
EAR Soft 21 Earplugs from 3M at Snorestore for Sleeping and Snoring
3M™ Ear Plugs 1100, 30 PR/PK (94-105 dB)
3M™ E-A-R soft Yellow Neon Earplugs 36dB
PJD Safety Supplies. 3M™ E-A-R™ E-A-Rsoft™ Yellow Neons™ Earplugs
3M Soft Foam Disposable Ear Plugs, Orange, 92077H8-DC, 32 Db, 8
3M™ E-A-R™ Classic Soft Earplugs, 311-6000, yellow, uncorded
3M 1100, Foam Ear Plugs, Uncorded Earplugs