SPECS: Weight: 295 g Head Circumference: S/M: 52 cm - 58 cm M/L: 53 cm - 61 cm DESIGN & DETAILS: ABS shell with expanded polypropylene and polystyrene lining and polyester webbing Impact and scratch-resistant outer shell for maximized durability Designed according to Petzl(R)'s Top and Side Protection label for optimal protection Wide ventilation holes for increased breathability Low-rear design for extra protection 4 headlamp attachment clips Foldable Omega(TM) headband with notch for ponytail Certified under CE EN 12492 and UIAA