Thicker sunshades typically offer better heat insulation and light-blocking effects, but thicker is not necessarily better. Material, installation method, and actual needs should be considered comprehensively. Multi-layer composite sunshades, made of materials like aluminum foil and polyester, have a moderate thickness yet can reflect over 90% of ultraviolet rays. Tests show they can reduce the temperature inside a car by 5 to 8°C, making them suitable for long-term parking. Magnetic sunshades, though thinner, use black rubber material with a light-blocking rate of up to 99% and are easy to install and remove. Overly thick sunshades may affect window operation or storage convenience. When choosing, It is best to prioritize materials that balance thickness and performance, such as high-density PET fibre or titanium silver coating, to ensure a combination of light-blocking rate (over 99%), heat resistance (significant temperature reduction), and adaptability (e.g., magnetic or elastic telescopic design), while avoiding reflective materials that interfere with driving visibility.
