What is a "thermal curtain"?

A thermal curtain is a type of window treatment that is designed to provide insulation and improve energy efficiency in a room. Thermal curtains are typically made of thick, heavy materials such as cotton, wool, or polyester, and are designed to fit snugly against the window to prevent drafts and heat loss. They can be used to keep a room warm in the winter and cool in the summer, and can also help to reduce noise and block out sunlight. Thermal curtains come in a variety of styles, colors, and patterns, and can be easily customized to fit any window size or shape. They are a popular choice for those looking to reduce their energy bills and create a more comfortable living environment in their home.