Safety Protection: bike helmet is made of high-density PC shell and EPS Foam with in-molding technology can surely improve safe performance. Cycling helmet with hard shell, detachable soft inner pad can absorb the pressure caused by external impact, provide the maximum protection for head from all directions. LED Rear Back Light: Bicycle helmet with LED rear back light can remind other riders or cars behind you to recognize your direction clearly, makes your cycling more and brighter at night or in the darkness weather. Magnetic Goggles: This bike helmet men women comes with magnetic goggles shield can be used as a sunglasses which can provide UV400 protection, not only protect your eyes against wind and sand, but also block the strong ultraviolet light, the goggle. Size Adjustable System: Our adult bike helmet 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(58- 62cm) which can meet the size requirements of most men and women users. Super Cool and Ultralight: This helmet in special aerodynamic design, with 18 breathable vents, reduces the weight on the head when worn. The 18 breathable vents can reduce air resistance and cool the head when riding, with soft inner pads, adjustable chin straps a more comfortable wearing experience. Material: PCandEPS colour: Gray Package Contents: 1 x Bike Helmet Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.