The Moldex 6970 Meteors are designed with a unique contoured shape which lines up with the shape of your ear canal. The soft foam material cushions the ear and the special shape eliminates pressure points at the smallest diameter of the ear canal for a super comfortable fit. You might even forget your wearing them! The large base is easy to grip for quick fitting and removal. Meteors are disposable - simply use and then toss after the day is finished. They are also corded so they can be conveniently worn around the neck when not in use. A bright green color allows them to be easily seen when checking for safety compliance. These earplugs are independently tested to be NRR 33, the highest independently available, for quality hearing protection in noisy areas.