Also known as roller blinds, are window coverings made of a single piece of fabric that can be rolled up or down using a mechanism installed at the top. These blinds are operated by pulling a cord or using a spring mechanism, allowing users to adjust the level of coverage and control the amount of light entering a room. Roll-up blinds are known for their simplicity, ease of use, and versatility, making them a popular choice for window treatments in homes and offices.