These curtains can block out sunlight, darker colors work better. Perfect for late sleepers and afternoon naps. Thermal Insulated: Our energy saving curtains insulate against summer heat and winter chill to balance your room temperature, cut down energy bills. Reduce outside noise, protect floor and upholstery from color shading. Easy to care: Machine washable in gentle cycle and cold water, do not bleach. Warm iron and tumble dry at low temperatures