1. 22-24.4 inch head circumference fits most adults 2. LED Technology: Built-in USB rechargeable light featuring 4 settings; Level 1 for 2 hours; Level 2 for 4 hours; Level 3 for 8 hours; SOS for 14 hours; 90-minute quick charge via USB-C 3. Quality Construction: Premium 100% cotton material with removable LED unit 4. Gift Value: Perfect holiday affordable gift for runners, campers, hunters, and outdoor enthusiasts; combines practical functionality with stylish design for year-round use.