The Powercap provides a hands-free lighting solution for everyday tasks. Whether you are walking or reading, the Panther Vision product easily provides light for any activity! Simply touch the edge of the brim where 2 LEDs are located. This cap is low profile, 100% cotton twill in unstructured styles. Adjustable hook and loop closure. 2 replaceable lithium CR2032 batteries. Simple one click on/off brim switch.