Melon Urban Active DD bicycle helmet This bicycle helmet combines the highest safety standards with a unique style. This helmet ensures a safe, comfortable and stylish ride. You can adjust the helmet via the breathable Coolmax Pads. This can be operated by means of a magnet. The rotary knob on the back of the helmet ensures that you can choose the ideal fit yourself. Cooling ventilation is provided by means of twelve ventilation holes. Specifications: Color: gray Gender: unisex Material: polycarbonate Fit system: fidlock magnetic buckle ventilation: 12 ventilation holes Head circumference: 52 - 58 cm Size: M - L