Material: These guards are usually made of durable and weather-resistant materials such as acrylic or plastic. Some higher-end models might be made from more advanced materials for added durability. Shape and Design: They are typically designed to match the contours of the side mirrors. Most rain guards are transparent or semi-transparent, allowing the driver to see through them clearly. Attachment Method: They attach to the side mirror housing using various methods. Some may use double-sided adhesive tape for easy installation, while others might clip onto the mirror or have a more complex attachment system. Functionality: The primary function of a side mirror rain guard is to divert rainwater away from the mirror surface. This helps in maintaining good visibility, especially during rainy or wet conditions. It can also prevent rainwater from dripping onto the window glass, which can be annoying for both the driver and passengers. Additional Benefits: Aside from rain protection, these guards can also provide some protection against dirt, mud, and other debris that might splatter onto the mirror while driving. Additionally, they can reduce wind noise around the side mirrors, making for a quieter ride. Aesthetics: Many car owners appreciate the sleek and subtle appearance that side mirror rain guards can add to their vehicle's overall look. Compatibility: It's important to ensure that the rain guards you choose are compatible with your specific car make and model, as the size and shape of side mirrors can vary widely.