Abstract: A light weight vehicle sun screen is provided having a mounting system adaptable to curved windows of varying curvature. A pair of articulated mounting brackets are connected to substantially flat mounting plates thereby allowing the mounting plates to pivot until they are substantially aligned with the glass surface. The mounting plates can be secured to the glass directly or to the frame adjacent the glass via reticulated fasteners or the equivalent. The screen is biased toward a retracted position by a biasing assembly mounted substantially within a roller. A biasing spring straddles the shaft and is mounted to the frame with built-in windup so as to bias the screen toward the retracted position. The spring force can be overcome by drawing the screen down and securing the screen to a suitable retaining device.