[High Safety Protection] Shinmax bike helmet is carefully constructed with an all-in-one polycarbonate solid PC shell and high-density shock-absorbing EPS foam can absorb the pressure caused by external impact, giving it excellent shock absorption and drop resistance, effectively reducing impact forces and providing you the most reliable safety. [USB Rechargeable Rare Light] bicycle helmet is designed with plug-in USB rechargeable LED light,3 Safety Red lighting modes bicycle helmet - Normal on, Fast flashing and Breathing light which can remind other riders or cars behind you to recognize your direction clearly,makes your cycling more safer and brighter at night or in the darkness weather.The rear light is waterproof, soaked in water can still be used. [Detachable Magnetic Goggles] Adult bike helmet comes with Detachable Magnetic Goggles Visor Shield can be used as a sunglasses with 3 strong magnet makes it easy to removed or glue it on, Not only protect your face against wind and sand, But also block the strong ultraviolet light, UV400 protection. The adult bike helmet can fit for mountain bike and road bike cycling. [Adjustable Reflective Strips] Bike helmets men women designed with reflective adjustable strips.Its role is the same as the LED Light.It can help other riders behind you clearly recognized your direction,Safer and Brighter in Night Cycling. [Size Adjustable Function]Our mountain bike helmets are designed with adjustable system, up and down adjustment function,an adjusting knob at the back of the adult helmet can increase or decrease the size of the helmet from 22.44 to 24.41inch(57- 62cm) which can meet the size requirements of most men and women users.(Including A Portable Backpack to store bike helmet,which bring you a more convenient riding experience).