Silicone earplugs are soft, mouldable, gently adhesive and comfortable. Silicone is the perfect material for earplugs. It's easily moulded into shape to fit the unique contours of your ears. Crucially, the earplug material doesn't go inside the ear canal. It adheres gently over the opening to it. While these aren't the highest noise reducing earplugs on the planet, they are arguably the most comfortable. Always read the instructions.