Salamander 2.0Classic hard shell helmet, practical and robust. Salamander 2. 0 has an external ABS shell that protects against penetration and an internal polystyrene (EPS) to absorb shocks. It has four headlamp clips. Air circulation is extremely efficient through the openings. One size (54 61 cm) which can be adjusted once the helmet is worn. The adjustment straps can all be folded inside the helmet to reduce the volume and allow compact storage in the backpack