Dual Purpose Earplugs. Removable Cord. Water and Noise. Reusable and Washable. Incredibly soft seal rings for extreme comfort. Seal out noise. 27 NRR (when used as directed) for power tools, loud concerts, shooting, racing events, etc.Seal out water swim, shower, bathe, water sports. Suggested Use:. Reach over head and pull up and back on outer ear to straighten ear canal. With opposite hand, grasp earplug stem and insert by pressing forward in a circular motion to form airtight seal.