The LUMEN helmet is equipped with LED light on the back which significantly increases the visibility of the cyclist during ride and delivers a very desirable increase in passive protection for cyclists. Turn on and off the LED light is easy with one hand without removing the helmet. LUMEN is made with IN MOLD technology and an extended backplate for maximum head protection. Of course there is an internal net protecting from insect and an antibacterial pad. Size description: M: 55-59 cm Weight: M: 260 g Color: matt black Number of ventilation holes: 24 The durability of the helmet is guaranteed by proven safety according to the CE EN 1078 standard