Colored string curtain for windows and doors. For those who want to add some color to their windows and doors, this trendy red thread curtain is just the right choice. With its many thin threads, the curtain provides a pleasant level of privacy without significantly darkening the room. It is also ideal for balcony and patio doors or as a decorative room divider curtain to visually separate living areas. The threads can be individually trimmed with scissors if needed.