Brand: ROCKBROS Product name: MTB helmet Material: Shell: PC (polycarbonate) + EPS foam (inside) Inner lining: silicone + foam Weight: 410 g Head circumference: 58-62 cm Double protection structure The combination of a PC shell and a one-piece molded EPS cushioning layer effectively counteracts and distributes impact forces. In addition, an integrated nylon shield protects against impacts outside the core zone for comprehensive head safety. Reinforced design with extended back of the head Specially optimized for mountain biking. The extended and deepened back of the head area completely encloses the neck bone, significantly reducing the risk of impact injuries to the neck area in the event of a fall – for greater protection in risky situations. Plant-based antibacterial inner lining The integrated inner lining made of ionic and plant-based antibacterial fabric effectively inhibits the formation of sweat bacteria and reduces odors. High-density foam and silicone padding absorb shocks. The lining is removable and washable for easy care. 16 ventilation channels The ventilation system with 16 aerodynamically optimized openings optimally directs airflow, accelerates the dissipation of heat and sweat moisture, and keeps your head cool and dry – even on long rides. Magnetic quick-release fastener & fully adjustable system Equipped with a custom-made, lockable magnetic fastener for putting on and taking off in seconds. The fastener offers a rotation range of over 90° for greater comfort. In combination with a dial for size adjustment, a Y-shaped strap, and an adjustable visor, the helmet adapts optimally to different head shapes and usage scenarios.