Sunroof system for performing passive radiative cooling

A sunroof system for a vehicle, the sunroof system comprising:

• glass slidably insertable into a vehicle body of the vehicle;
• and
• a passive radiant cooling layer disposed below the glass and slidably insertable into the vehicle body,
• wherein the passive radiant cooling layer includes a first emission layer having a high emissivity in a first band relative to a band outside the first band, a second emission layer having a high emissivity in a second band, which is included in the first band and narrower than the first band, relative to a band outside the second band, and a reflection layer having a high reflectivity in a third band, which is a shorter wavelength than the first band, relative to a band outside the third band,
• wherein the second emission layer having a structure in which a second functional layer is interposed between a first functional layer and a third functional layer,
• wherein each of the first functional layer and the third functional layer includes a material having a higher light reflectance than the second functional layer, and
• wherein the second functional layer includes a plurality of transparent layers having different refractive indices.