Description:Brand: RNOXColor: matte black, white, orange, blue, fluorescent yellow, green and whiteMaterial: EPS foam PC shellApplicable head circumference (CM): 55-60Helmet inner size (CM): 22*17Whether integrated: oneHelmet stomata number: 16Product matching: noneProduct size (CM): 27*20*14.5Product weight (G): 190Specifications:1. Powerful protection: The outer shell of the helmet is made of ultra-light PC plastic, which meets American bicycle safety standards. The inner lining material is high-quality EPS foam, which can absorb impact well and provide more protection for cyclists.2. Ventilation and ventilation, in line with aerodynamics: professional aerodynamics and ventilation design, 16 vents, let air through the bicycle helmet, help increase speed and keep cool3. Lightweight and comfortable, light weight and no burden: This bicycle helmet is made of lightweight materials to keep the weight to a minimum without sacrificing the safety of comfortable wear4. Humanized design: This adult bicycle helmet adopts standard size, and the head circumference can be adjusted to the best5. Multi-color options: The helmet has a variety of colors to choose from, with bright colors, smooth appearance, and good gifts!Package Included:Helmet*1Notes:Please check the detail size/model information before purchasing.Due to the different monitor and light effect , the actual color of the item might be slightlydifferent from the color showed on the pictures . Thanks for your understanding.Please allow 1-2 cmmeasuring deviation due to manual measurement.