The Dorr Lens Cap will protect the front of your lens against dust, dirt, moisture, scratches and damage. Made from strong, high quality plastic, the pinch style of cap ensures that it stays firmly in place. It also has a safety string, so ensure that when the cap isn't on the lens, it doesn't inadvertently get left on a wall or dropped from a pocket. The cord is long enough to allow the lens cap to swing freely off the front of the lens.