1、Integrated in-mold PC anti-fall outshell with multi-dimensional cone-shape EPS impact foam, combile with safety and comfort. 2、Humanized headcircumference adjustable design, rotation button, easy to adjust the tightness. 3、Cartoon helmet, lightweight and portable, reduce stress, and provides comfortable wearing. 4、Equipped with 24 vents for quickly heat radiation, provides cooling wearing experience when you\u0027re riding hard. 5、Soft pad, high density nylon band for fixed helmet, will not fall off even under side impact. 6、Detachable and washable lining design, simple easy to wash. 7、Convenient and smooth buckle, quickly clasp on and take-off. 8、Visor attached to make your eye free from rain, sun, mud, and tree branches. 9、Head circumference adjustable for comfort wearing, 2 sizes optional, S/M size suitable for headcircumference 540-580mm, M/L size suitable for headcircumference 570-610mm. 10、Application: mountain biking, scootering, trail Cycle, riding. Integrated in-mold PC outshell with multi-dimensional cone-shape EPS impact foam, combine with safety and comfort. Equipped with 24 vents provides cooling wearing experience when you're riding hard. Humanized headcircumference adjustable design, rotation button, easy to adjust the tightness. Can be used for Mountain biking, scootering, trail Cycle, and etc.. Features: Integrated in-mold PC anti-fall outshell with multi-dimensional cone-shape EPS impact foam, combine with safety and comfort. Humanized headcircumference adjustable design, rotation button, easy to adjust the tightness. Cartoon helmet, lightweight and portable, reduce stress, and provides comfortable wearing. Equipped with 24 vents for quickly heat radiation, provides cooling wearing experience when you're riding hard. Soft pad, high density nylon band for fixed helmet, will not fall off even under side impact. Detachable and washable lining  design, simple easy to wash. Convenient and smooth buckle, quickly clasp on and take-off. Visor attached to make your eye free from rain, sun, mud, and tree branches. Head circumference adjustable for comfort wearing, 2 sizes optional, S/M size suitable for headcircumference 540-580mm, M/L size suitable for headcircumference 570-610mm. Application: mountain biking, scootering, trail Cycle, riding. Specifications: Name: Bike Helmet Material: EPS+PC Color: white, red, black (optional) Headcircumference: S/M: 540-580mm / 21.26 * 22.83in M/L: 570-610mm / 22.44 * 24.02in Item size: 297 * 217 * 152mm / 11.69 * 8.54 * 5.98in Package size: 285 * 230 * 155mm / 11.22 * 9.06 * 6.10in Package weight: 455g / 1.00lb Packing List: 1 * Bike Helmet 1 * Bike Helmet