Net Sheer curtains offer privacy and diffused light, and come in many different styles. Nets are traditional, made with a knitted open weave fabric while voiles offer a softer look, and come in many more styles. Sheer curtains act like a diffuser, softening natural light and reducing the glare associated with direct sunlight. They will help protect your interior from UV rays, reducing the risk of fading and sun damage to furniture, flooring and soft furnishings.