his race-inspired design is known for its great fit & great value. With similar features to the S-Works Prevail&8212;like the Tri-Fix webbing system & 4th Dimension Cooling&8212;the Propero II handles even the most intense efforts on the pavement. 4th Dimension Cooling System with Mouthport Headset SL fit system with 4-position height adjustability is secure & easy to adjust on the fly Tri-Fix web splitter for enhanced comfort & ease of strap adjustments Composite matrix internal reinforcement allows larger vents for greater cooling Soft 4X Dry Lite webbing material 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