Blockout Blinds for all those shift workers or those who love to have a sleep in and don’t want to be annoyed by the sun or street lamp, blockout curtains are your perfect friend. This fabric blocks out 100% light. It also helps with reducing heat, cold and sound. It will help reduce your electricity bill because your air conditioning and heating will function better because of the fabric thickness and the curtains pocketing effect which all lends to proper insulating.