Bloc skylight blinds improve the functionality of your roof windows while adding a stylish touch to your home. Specifically designed to fit Velux roof windows, Bloc's blinds are easy to install and offer great value. They can be fitted quickly without the need for a drill. The blackout fabric features a white thermal backing that protects your room from the sun in summer and retains heat in winter. The brushed seal system creates a barrier between the blind and the window frame, effectively blocking unwanted light and reducing heat loss.