Perfect Fly Fishing Cap with Lights. One size fits all with a fully adjustable velcro waste band. A baseball style cap made of cotton. It has 5 LED lights. Narrow angle LEDs illuminates up to 45 feet ahead and wide angle LEDs provide good light for close up vision. It uses CR 2032 Lithium batteries that are included with the hat. The provides continuous use of up to 72 hours. It has an Off/On battery switch inside the cap band to conserve the battery when not in use. It has an Off/On light switch located under the front bill that provides more than 48 lumens.