Blackout curtains are used to prevent natural light from penetrating. Blackout curtains are thus made of thick polyester fibres that restrict light from entering the room, helping people get a good sleep even during day time.
A sheer curtain allows a lot of natural light to enter the room. For those who are a little concerned with privacy can opt for a semi-sheer curtain. These curtains come in a variety of fabrics such as cotton, silk and synthetics.