Bugs, debris, and loads of dust assault our vehicles' air cleaners on a daily basis. Just as the military protects us, S&B Filters air filter wraps keep harmful enemies to your vehicle's motor at bay. These prefilters are designed to fit individual S&B filters. They have micron sized openings, allowing clean air to easily get through, while keeping sand, dust, and suicidal bugs from their intended destruction. Extend the life and cleaning interval of your cotton filters with S&B Filters air filter wraps.