Safe comfortable breathable lightweight built for young riders exploring from school routes to mountain trails. The rockbros youth helmet provides dual gb & ce safety certification, advanced protection, and breathable comfort in every ride. Dual protection pc eps dual-mode one-piece molding: high-strength pc shell and high-density eps foam absorb impact effectively. Multi-layer anti-impact cushioning: enhanced shock absorption for safer rides. One-piece edging design: seamless, durable, and aerodynamic protection. Comfort & hygiene ionic plant-based antibacterial lining: inhibits bacteria and odor from sweat, prolongs freshness between washes. Soft, odorless & removable inner pads: easy to clean and skin-friendly comfort. Breathable airflow design: 17 ventilation holes guide wind through for a cool, dry ride. Smart safety details magnetic taillight mount optional : increases night visibility for safer evening rides. Y-shaped adjustable straps & soft chin pad: stable fit, prevents ear rubbing, and improves comfort. Integrated adjustment knob: flexible sizing 54 58cm fits different head shapes. Dual-mode design switch freely between daily mode reduced wind resistance and mountain mode with visor to block sun and branches . Perfect for cycling, roller skating, skateboarding, and outdoor adventures. Product details material: pc shell eps foam polyester lining sponge padding head circumference: 54 58cm m size weight: 270g 30g certifications: gb ce