The Björka HB51 bicycle helmet is our flagship helmet. Your favorite Björka helmet for versatile cycling: road, cyclo-cross, track or triathlon - leisure or competition. This premium bicycle helmet is stylish, ventilated and aerodynamic. The HB51, with its double in-mold polycarbonate design, is light (210 g.) And durable. By wearing a helmet, your safety will be optimal during your bike rides. Comfort will also be there with absorbent EPS foams (expanded polystyrene) benefiting from an antimicrobial treatment. The adjustment system of the HB51 bike helmet is just as powerful with a precise, fine and 360 ° adjustment. A comfortably worn helmet is the start of a good bike ride. Finally, choose your color. With 8 colors available, there is something for everyone. The HB51 is part of our famous glasses helmet combo Björka. Associated and matched, the HB51 and the cycling glasses Lucifer form a shocking duo to ensure safety, comfort and performance, without neglecting your style! What more could you ask for?