Is there anything nicer than coming home after a long day at work and putting on your pajamas or at least your pajama pants? Lovely soft cotton or one in the finest silk is up to you. But did you know that silk has dual properties? In the summer, the fabric keeps you cool and transports the heat away from your body, and in the winter it keeps you warm and comfortable. 100% silk doesn't roll and get lumpy like the cheaper varieties with satin can do.