Leatt Helmet MTB Trail 1. 0 Universal Fit Helmet - Adult Entry-level price, serious protection The Leatt Trail 1. 0 brings the brand's core safety technology to an accessible price point without cutting corners on protection. The 3-in-1 safety system combines 360deg Turbine Technology, in-molded impact foam, and a lightweight polymer compound shell to address low-speed, high-speed, and rotational impacts together. The universal fit system is engineered to accommodate a wide range of head shapes and sizes in a single OS shell (55-61cm), with a Fid Loc magnetic buckle for fast, one-handed use. An adjustable visor with a breakaway function reduces rotational forces during a crash, 17 channeled vents keep airflow moving, and a moisture-wicking washable liner keeps things fresh. Certified CE and CPSC, backed by Leatt's 3-year Helmet Replacement Program. Features360deg Turbine Technology allows the helmet to move slightly on the head upon impact, reducing peak rotational acceleration to the head and brain, with energy-absorbing turbine discs that also manage low-speed concussion-level impacts3-in-1 safety system combines 360deg Turbine Technology, in-molded impact foam, and a lightweight polymer compound shell to protect against low-speed, high-speed, and rotational forces Universal fit system covers a wide range of head shapes and sizes in a single OS shell (55-61cm) for simplified sizing Fid Loc magnetic closure for fast, secure, one-handed buckling even with gloves on17 channeled vents for effective airflow and cooling even at lower trail speeds Adjustable visor with breakaway function for adaptable sun coverage and reduced rotational force during impacts Moisture-wicking, breathable, and washable inner liner for all-day freshness Plastic-free packaging3-year Leatt Helmet Replacement Program included SPECIFICATIONSShell Lightweight polymer compound Impact Protection360deg Turbine Technology + in-molded impact foam Ventilation17 channeled vents Fit System Universal (OS) with strap divider and adjustment system Closure Fid Loc magnetic buckle Visor Adjustable with breakaway function Certifications CE, CPSCWeight340g (Universal Adult)Intended Use Trail, All-Mountain, XC MTBSizing Size Universal Adult Head Circumference (in)21 5/8 - 24"Head Circumference (cm)55 - 61cm | Leatt | Helmet Mtb Trail 1. 0 Universal Fit Adult Men's | Size 55Cm In White