Mossy Oak Infinity 4-LED Beanie Light: * Features 4 ultra bright LEDs with slit inside cuff for easy access to battery pack * The 4 replaceable CR2032 lithium batteries have 50+ hours of battery life * Made with poly/spandex compression fleece * Care instructions: before washing, remove batteries, then hand wash * Material content: 97 percent polyester/3 percent spandex