Raw Stone Regulus 40R filter set: round city and fog filters for the Raw Stone Regulus 40R, made for daily commuting and long rides in all weather. The set holds two black silicone rings, two glossy black discs etched with the Raw Stone logo and two translucent amber discs. The city filters are 100% opaque to reduce glare and make city rides more comfortable, while the fog filters improve visibility in foggy, rainy and low-light conditions. The filters use 3mm thick acrylic for long-lasting use and resistance to wear and impact, together with automobile-grade, heat-resistant silicone that keeps its flexibility and strength from –40°C to 200°C.