SAFETY&STRONG PROTECTION: Special aerodynamic design, Strong polycarbonate shell and the multi-density EPS foam filled in the inner part that can absorbe and reduce the pressure caused by external impact, giving you the strong protection. LIGHTWEIGHT&PORTABLE: the helmet is about 280g, use the ultra-lightweight and environmental friendly EPS foam padding, so you'll feel ease to wear it during the cycling trip.An extra portable carrying backpack is included.So convenient for you tocarry when cycling. VENTILATION&BREATHABLE: 18 air vents all-around breathable, the specialized aerodynamic and ventilation design allow air go through the biking helmet which help dissipate the heat and keep your head cool. DETACHABLE MAGENETIC GOGGLES: The goggle can protect your eyes from the wind,dust,bug and sand, also block the strong UV light. The Magenetic goggle design is easy for you to flip up or remove with one hand when cycling, meets your 3 wearing needs: Gogglesup, Goggles down and No goggles. First, standard riding mode without goggles. Second, low speed riding mode with goggles up. Third, speedy riding mode with goggles down. an adjusting knob at the back of the adult helmet and you can fasten the inner strap to make it suitable for different head size 22.4-24.4/56- 62cm, meeting the needs of most cycling riders and applicable to the majority of adults head circumferences.Adults men,women, teens and ponytail are compatible. Colour Name:BlackRed