TruDefinition WeatherGuard HP Impact Resistant Shingles is an excellent choice for homeowners concerned with the effect of severe weather on their roof. When paired with WeatherGuard HP Hip & Ridge Shingles, they offer beauty and performance before, during and after the storm. Unlike standard shingles, these Shingles are engineered with an integrated polymeric backing material for excellent performance and specially formulated to provide great contrast to any roof.