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Material and Care Thermoplastic Multi-density EPS developed in 3 sizes 2 shell sizes High Resistance Thermoplastic Chin guard opening system designed to prevent accidental opening Metal chin guard block system ensures the double homologation P/J Adjustable air vents 2 front vents 1 rear extractor Fresh and smooth breathable fabric Cheek pads interchangeable between all sizes Removable and washable interiors No stitches in sensitive areas Fit especially designed to allow wearing glasses Ready for generic communication system Embracing neck roll profile DrySpeed: instant sweat absorption Visor step for city position Anti-scratch 190 horizontal field of view Micro-opening system Patented Extra Quick Release System Integrated anti-scratch sun visor, removable without using tools Multistep visor mechanism UV protective Pinlock 70 MaxVision Included Steel micrometric Double homologation P/J Wind protector Warning to our consumers: This product can expose you to chemicals known to the State of California to cause cancer or birth defects and reproductive harm

Thus lungs may have allowed early fishes to become large and active animals in a marine environment.