With its double honeycomb design, it's fabrics insulate your windows against drafts and air leaks. The polyester fabric blocks nearly 100% of UV rays as it changes the glaring sun into gentle light. Upgrade Options: DuoFold Top Down/Bottom Up) - made with two operating cord locks, right cord lowers the middle rail and left cord raises the bottom. OmniRise - a continuous cord loop, the cord loop is pulled in a circular motion to raise or lower the shade. Chordless - can be raised or lowered without lift cords with a gentle push or pull on the bottom rail handle. Day/Night Shade - made from two fabric panels, one between the head rail and center rail, and one between the center rail and bottom rail. Either panel, or portion of a panel can be used to cover the window..