These Inner Fender Dust Shields attach to the inner guards using stainless-steel staples. They cover the upper control arms, sealing the engine bay from the wheel well area. The dust shields are made from masticated rubber, the same material used for the fan shroud seal. Masticated rubber is essentially recycled rubber reinforced with synthetic fibers. The rubber used on these dust shields looks similar to the originals, but is a little thinner.