Unleash your adventurous side with our Aegis X9 Motocross Helmet with Bluetooth Headset – an essential accessory for every ATV, dirt, and motocross racer. Designed with multiple ventilation ports, this helmet will keep you comfortable even in the most challenging terrains. Features: Bluetooth Enabled: This helmet features built-in Bluetooth technology for effortless connectivity. Enjoy long-lasting battery life with long-term standby for your extended riding sessions. Full Coverage: Offering all-round intimate protection, our full coverage helmet safeguards you during the most thrilling rides. Quality Materials: Crafted with ABS processed plastic and high-density buffer foam, this helmet provides multi-layer protection. The integrated baking paint further enhances its beautiful appearance and durability. Premium Fabric: Our helmet's comfortable padded inner lining is made from hypoallergenic technical fabric, ensuring it is soft, absorbent, breathable, and flexible. Designed with your comfort in mind. Multi-Ventilation System: The helmet features a multi-ventilation system design that expels hot air from the helmet, ensuring optimal comfort even during long rides. Abundant Gifts: Each helmet purchase comes with high-definition goggles, gloves, and masks. These accessories effectively block the sun and prevent wind and dust, providing comprehensive protection. Size Chart: Small: 52-54CM / 20.5-21.3 inches Medium: 54-55CM / 21.3-21.7 inches Large: 55-57CM / 21.7-22.4 inches X-Large: 58-60CM / 22.8-23.6 inches Note: 1. Manual measuring, please allow 1~3 mm error, thank you. 2. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures.