The 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 > Ultra-light Mindset micro-dial fit system with height adjustability for perfect fit & comfort > Tri-Fix web splitter for enhanced comfort & ease of strap adjustments > Thin soft & lightweight 4X Dry Lite webbing won&8217;t stretch out with sweat or water > Instrap webbing system for ultra-light construction & security > Complies with one or more of the following safety standards for bicycle helmets: CPSC SNELL B90A CE & AS/NZS