• USB interface for fast charging: 200mAh battery life meets daily use
• Protect your ears from frostbite: Lengthening on both sides is designed to better protect ears and prevent frostbite 
• Reserved holes for glasses: Easy to wear glasses when riding
• Riding without burden: Light weighs about 16g, no burden with the hat during cycling
• Soft and free: Elastic fabric 1s is soft and skin-friendly for a variety of head circumferences to wear

Specifications:

• Material Nylon 68%, spandex 8%, polyester 24%
• Head circumference: about 57cm (not stretched)
• Weight: about 47g (without lights)
• Headlamp mode: Three kinds of patterns
• Suitable to use: Cycling and other outdoor sports