Further Detail Flexible light control and effective insulation. The VELUX FSK are solar powered blinds suitable only for flat roof windows. The light-dimming double-pleated blind with an aluminium coating regulates the light levels entering a room while also improving insulation indoors. The improve insulation helps against heat and cold, providing a better indoor climate for extra comfort. The FSK blind integrates seamlessly with the VELUX flat roof windows and there are no visible cords as they are hidden between two layers of cloth. The FSK blinds are easy to install from inside your home and operated with a VELUX remote control and are now compatible with io-homecontrol. The light-dimming, double-pleated FSK Solar blind increases indoor comfort while making an attractive choice for any home.