Millimeter-wave-transmitting garnish

A millimeter wave transmissive decoration employed in a vehicle equipped with a millimeter wave radar device that emits and receives millimeter waves, the millimeter wave transmissive decoration being configured to be arranged forward of the millimeter wave radar device in an emission direction of the millimeter waves, the millimeter wave transmissive decoration comprising a layer structure that includes layers stacked in the emission direction, wherein

• the layers include a decorative layer configured to decorate the vehicle and a plastic layer,
• at least part of the decorative layer is made of a white plastic layer,
• the plastic layer is in contact with the white plastic layer,
• the white plastic layer is made of a polycarbonate plastic containing particles of titanium oxide having a rutile crystal structure,
• a thickness in the emission direction of the white plastic layer is less than or equal to 2.0 mm,
• a permittivity of the white plastic layer is less than or equal to 3.1, and
• an L value in a Lab color space of the white plastic layer is greater than or equal to 80.