Many thick curtain fabrics with lining can create an air layer, which can insulate the temperature. In hot summer, when the sun is strong, the curtain can be pulled up. In cold winter, it can also withstand the low temperature outside the window.
Thick curtain fabrics also have sound absorption function, clever use can block part of outdoor noise, and improve indoor quietness.
In fact, the most direct purpose of installing curtains indoors is to block the sight of outdoor personnel and protect personal privacy. The space will be separated by curtains, which not only protects the privacy of guests, but also improves the utilization of space.