ANRDDO all-weather automotive replacement blades are durable all-weather blades that feature memory curve steel for a uniform pressure that provides a clean, clear wipe on modern-day curved windshields, designed specifically for your vehicle's blade lengths, it is tested to perform over 1.5 million cycles. Built for tough weather climates, ANRDDO natural rubber provides superior wipe quality in the most extreme temperatures (tested to -20 degrees F and +194 degrees F). The natural rubber won't dry out and crack in the summer heat, or freeze and break in the winter cold. The natural rubber is designed to provide exceptional wipe performance in all types of severe or inclement weather conditions experienced while driving, such as heat, wind, rain, sleet, snow, and ice blade size finder.