More convenient and easier to use than disposable foam earplugs, Tri-Flange Earplugs feature a flexible, thermoplastic ear tip with a three-flange design to ensure both an excellent ear-canal seal and a comfortable fit. Contoured livewire stems allow you to insert and remove your earplugs without touching the tips, so the tips and your ears remain clean, even if your hands or gloves aren't. Pre-molded earplug tip and stem are washable and reusable (handwash with soap and water only). Compatible with the 3M E-A-Rfit Dual-Ear Validation System-E-A-Rfit provides an accurate quantitative assessment of exactly how much noise-reduction a hearing protector will provide to any given worker.