Push-Ins™ earplugs 3M™ E-A-R™ can be worn using the one-handed or two-handed insertion method. SNR 35dB for the two-handed input method and SNR 31dB for the one-handed input method.The shape and size of the soft foam tips conform to the user's ear canal to ensure better comfort and a better fit for extended use.The tip is made of 3M™ E-A-Rform™, which gives a smoother surface than other 3M foam tips.