Provides protection from the elements for M-16/AR-15 style magazines. Simply slip the Cammenga Magazine Dust Cover over the top opening of magazine to preserve optimal feeding performance. Made for excellent abrasion, cut, tear, deformation and flame resistance. Provides protection from ozone, water, acids, bases, grease, salts, seawater, oil, fuel, and alcohol with a temperature range of -20° to 250° Fahrenheit.