Security Bicycle Riding Adjustable Breathable Helmet

SAFETY - Durable PC shell is solid and hard to break, effectively protects your head, providing you high security when you are riding., ADJUSTABLE - With adjusting buckles and 360 degree rotating back knob to fit different head size, you can spin the knob simply by one hand to adjust the tightness, easy to operate., COMFORTABLE - Elastic built-in padding and detachable chin cushion absorb shock and sweat, preventing bumping to your head and sweat flowing down to your neck., BREATHABLE - Ventilated vents make the helmet comfortable, breathable and cool to wear, won’t swelter., VERSATILE - Protects your head during cycling, MTB riding, motorbike riding, skating, skiing and daily working.