Smart4U Helmet Breathable Protective Equipment With Taillight

PROTECTIVE: Integrated PC shell for great impact resistance and EPS foam for great buffer action, dual protection ensures great safety during sports., VENTILATED: 12 intake and exhaust vents create a air circulation system to keep head cool and comfortable., COMFORTABLE LINING: Superior absorbent and washable lining for comfortable wearing experience and detachable for cleaning., SAFETY TAILLIGHT: Built-in rechargeable taillight with tidal lighting, strobe and fast flash, and automatically sense the brightness of environment and lighting for safety, and lasting lighting for about 36 hours., ADJUSTABLE: Rotate the adjustor for proper tightness and head circumference is 22.4-24.0in(L) / 21.2-22.8in(M) .