TESTED AND CERTIFIED: Thoroughly tested and proven to muffle sound up to 28 dB! In accordance with European Regulations. Sustainable hypoallergenic material without silicone; so no allergic reactions or irritations!. AWARD-WINNING DUTCH DESIGN: Alpine is an innovator and leader in quality hearing protection. All earplugs are designed and produced in the Netherlands. A wide variety of earplugs ensure that you can do what you love to do without risking ear damage!. COMFORTABLE UNDER YOUR HELMET: The unique soft filters are a perfect match for a motorbike helmet; they are perfect for longer rides as they do not irritate. You can take them out easily as well!. ENJOY YOUR RIDE: The special AlpineAcousticFilter will ensure that your engine is still audible. The same goes for communication systems and navigation; so riding your motorcycle is still the same great experience!. PREVENT PERMANENT HEARING DAMAGE: Environmental noises can reach 100 Decibels at just 75 Miles per hour. This means that chronic hearing damage can be done in just 7 minutes! Plus you will get tired faster. Perfect for touring!.