Mountaineering, Rock climbing, Ice climbing Kevlar + EPP + EPS Designed specifically for rock climbing, mountaineering, and various expedition activities, the Airo Ultra is a multi-functional lightweight helmet offering exceptional breathability and robust protection. The top crown features Ultra-High-Molecular-Weight Polyethylene fiber composite (Kevlar) as an anti-penetration outer shell, known for its lightweight, high strength, superior abrasion resistance, strong toughness, and outstanding impact resistance. The main body is constructed with Expanded Polypropylene (EPP) in-mold technology, offering excellent deformation recovery, effective shock absorption, high strength, and a lightweight build. It is also non-absorbent, heat-insulating, non-toxic, odorless, and recyclable. The top impact buffer zone uses high-density in-mold EPS foam to provide superior impact protection. Features a patented clip-in assembly structure that joins two shell bodies of different densities via dedicated clips. This eliminates glue aging risks, reduces helmet weight, and delivers targeted protection across different areas of a single shell. Designed specifically for Asian wide head shapes, making it particularly suitable for round heads and larger head circumferences. Specially reinforced rear head protection to accommodate the natural human instinct to duck during falling rock emergencies. Fully adjustable, fast-lock fit system ensures secure wear and accommodates various head shapes. 7 surrounding ventilation ports accelerate airflow to quickly dissipate heat from the head. Slightly upturned front rim expands the climber's upward field of view. Integrated removable and washable inner padding ensures cleanliness and hygiene. Front embedded headlamp clips + rear attachment webbing securely hold headlamps and snow goggles in place. Size/Head Circumference: XS-M: 48-56cm M-XL: 55-61cm L-XXL: 58-63cm Weight: XS-M = 211g M-XL = 218g L-XXL = 224g Certification: CE EN12492, UIAA