A replacement red filter for the GamePro Marsh MS4400 rechargeable LED spotlight. The filter fits over the front of the Marsh's reflector and turns its cool white beam red. Red light is widely used by hunters because many animals are less sensitive to it, so you can scan for game at night with less chance of spooking it, and it also helps you keep your own night vision. It is also handy for night fishing, astronomy and moving around camp without blinding others. The Marsh is supplied with a red filter in the box; this spare is for replacing a lost or damaged one or keeping an extra in the vehicle. Check that your spotlight is the Marsh MS4400 before ordering, as GamePro spotlights use different head sizes.