ABS Lens Plate Protects Front ElementSoft Flexible Elastomer Cap Slips OnSecure Fit Prevents Cap Falling OffStrong, Durable, and Rugged DesignThe strong and durable design of the 114mm Defender Lens Cover from PolarPro is made of a soft and flexible elastomer that stretches and slips onto the front of your lens. The front of the cover is made of an ABS plastic plate that protects the front element of the lens against bumps, scratches, dirt, and dust.