You can be creative with this depending on your needs. And now you've got a thermal curtain. They make an amazing difference in how warm you sleep at night, and they can look as beautiful as you care to make them. Both summer and winter they can regulate the temperature in your room, depending on whether you want to keep the heat in or the heat out, which can lead to big savings in energy bills. If you live in Humboldt County and want to make the curtains yourself, you can buy the material from Fabron Window Coverings in Eureka, and if you live anywhere else contact your local fabric store or curtain shop.
Most small cities have at least one store that makes curtains.
Here is also a list of web resources, but they're not linked. This takes you to the search page. Will also do special orders. For Warm Window products Barb's Custom Draperies site will be open in May 2000.