What is a "tie-up shade"?

A tie-up shade is a type of window treatment that is made of fabric and is designed to be raised and lowered using fabric ties that are attached to the sides of the shade. When raised, the shade is tied in place to create a folded, gathered effect that allows natural light to filter through while still providing some degree of privacy. Tie-up shades are typically made of lightweight materials such as cotton or linen, and come in a variety of styles and patterns, from simple and understated to more decorative and ornate.