**Product Specifications:**
**Brand:** YEMA
**Model:** 828S
**Certifications:** 3C, New National Standard
**Safety Features:** Impact-resistant ABS shell, thick EPS cushioning for shock absorption
**Visor:** Dual visor design for easy switching, anti-scratch and anti-fog properties
**Ventilation:** Ventilation system for breathability, anti-fog effect for clear vision
**Comfort:** Removable and washable ear pads, cotton inner lining for warmth and comfort
**Size:** Full helmet measuring 34cm x 26cm x 26cm, weight approximately 1279g, suitable for head circumference up to 62cm
**Installation:** Easy mirror base installation process in four steps
**Maintenance:** Surface cleaning with water wax, mirror cleaning with water and cloth, inner lining washing weekly
**FAQs:** Adjustable inner lining for better fit, slight scratches and odors are normal, minor imperfections due to transportation
Please note that the product specifications include details about the YEMA dual visor helmet with 3C certification, emphasizing safety, comfort, and maintenance instructions.