Special care has to be taken with the telescopic sight, because the front lens cannot be fully covered and is made of a highly reflective surface (normally polished glass) off which the glare of the sun can easily reflect, drawing attention to the sniper's position. Common solutions are to avoid exposure to direct sunlight by taking up a position in a shaded area or by covering the lens in non-reflective materials (some type of duct tape, fabric or metal mesh) leaving only a small slit to see through.