A one-size-fits-all knit cap with a headlight, featuring cold and windproof functions. Recommended for: Nighttime walking, cycling, outdoor activities, mountain climbing, fishing, and nighttime work. Hand washable. Color: Black Size: Unisex Free Size (Main body) Approx. W21 x H25 cm (with header card) Weight: Approx. 95g (Main body) Main Materials: Polyester, Acrylic, TPR (Knit cap) ABS, TPR, PP (LED light) Other Specifications: Power Source: CR2032 x 2 (Test batteries included) Lighting Time: Approx. 8 hours (High), Approx. 15 hours (Low), Approx. 20 hours (Flashing) *Lighting time may vary depending on the batteries used, environment, and usage frequency. Gender: Unisex Features: Heat Retention/Cold Protection, Windproof Thank you for looking.