This free-size knit hat with a built-in headlight provides cold and wind protection. Recommended for nighttime walking, cycling, outdoor activities, mountain climbing, fishing, and nighttime work. Hand washable. Color: Black Size: Unisex free size (main body) Approximately W21 x H25cm (with header card) Weight: Approximately 95g (main body) Main materials: Polyester, acrylic, TPR (knit hat) ABS, TPR, PP (LED light) Other notes: Power source: CR2032 x 2 (Test batteries included) Lighting time: Approximately 8 hours (high), approximately 15 hours (low), approximately 20 hours (flashing) * Lighting times may vary depending on the batteries used, environment, and frequency of use. Gender: Unisex Features: Heat retention/cold protection, wind protection Thank you for viewing.