S-Works Prevail is the ultimate lightweight racing helmet combining great ventilation aerodynamic design & ultra-light construction for the best all-around performance. Patent-pending Dual-Density EPS optimises impact performance Patented Kevlar-reinforced Inner Matrix for ultra-light construction & energy management Mega Mouthport optimises cooling & sweat evaporation 4th Dimension Cooling System with deep internal channels massive vents & aligned exhaust ports Ultralight Mindset micro-dial fit system with height adjustability for perfect fit & comfort Tri-Fix web splitter for enhanced comfort & ease of strap adjustments Instrap webbing attachment for ultra light construction & security Thin soft & lightweight 4X Dry Lite webbing won&8217;t stretch out with sweat or water Complies with one or more of the following safety standards for bicycle helmets: CPSC SNELL B90A CE & AS/NZS