I've been a long user of Sun Zero curtains. Love that they block out 100% of the sun and some of the heat, especially during the hot summer months.  We utilize these curtains in the upstairs master bedroom and den, where the late afternoon sun strikes the hardest.  Material is THICK and durable.  Easily washable and ironable. Sun Zero curtains are also good looking and modern, and come in a variety of patterns and colors.  My friend recommended using these curtains as it gets very hot here in Southern California during August and September months and these curtains make rooms cooler by blocking the sun and heat.