Hybrid climbing helmet suitable for unisex applications mountaineering ice climbing big wall size adjustments rotary knob adjustment system adjustable chin strap inner padding foam padding chin padding without chin pad head lamp holders with headlamp mount 4 clips outer material abs inner material polystyrene size head circumference 55 615 cm number of air vents 7 weight 340 g security standards en 12492 uiaa 106 features foldable headband colou