Got these to block out the moon (I know moon instead of sun sounds crazy) but we have the brightest moon coming in our bedroom windows at our new house.  Since we cant have black out curtains (my hubby will sleep in likes hes on vacation lol) these work great. I actually made my own and added a patterned fabric on the top and made these as the liners and they are perfect(can also be reversed). Easy to hang and perfect length.