: RNOX Color: white, black, colorful cyan, colorful purple, black-red gradient, black-blue gradient, white-blue gradient Material: EPS foam + PC shell Applicable head circumference (CM): 58-63 Helmet inner size (CM): 22*17 Whether one type: one type Helmet stomata number: 16 Product matching: none Product size (CM): 26*22*14.5 Product weight (G): 210 Specifications: 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 cool 3. Lightweight and comfortable, lightweight and no burden: This bicycle helmet is made of lightweight materials, keeping the weight to a minimum without sacrificing the safety of comfortable wear 4. Adjustable design: This adult bicycle helmet adopts standard size, and the head circumference can be adjusted to the best 5. Multi-color options: The helmet has a variety of colors to choose from, with bright colors, smooth appearance, and good gifts Package Included: Helmet*1