Material: Fireproof ABS+EPS foam inner lining Weight: 740g. Colors: Available in multiple optionsincluding black, gray, red, yellow, blue, orange, and white. Size：Recommended head circumference within 61 cm. Protection performance: Equipped with strongimpact resistance,effectively protects head safety. Accessories: Includes helmet one set of fuzzy velro, one set of reflective tape, and one set each of thick and thin inner padding cotton. Adjustment system: Uses knob adjustment system for instant helmet tightness control, ensuring secure and