This is a 3M/Peltor Ear Plug known as the Tri-Flange, model 97317-10C.
Tri-Flange Reusable Earplugs feature a triple-flange design that helps provide a custom fit. The patented flanges and flexible stem are made of a soft" non-irritating polymer to help provide protection and comfort.
Features:
Noise Reduction Rating 26 dB
Washable and Corded
Triple-Flange Design for Snug, Comfortable Fit
