Adult Road Bike Helmet with MIPS V6530

CONSTRUCTION: Fusion In-Mold Polycarbonate Shell. FIT SYSTEM: Float Fit integrated with MIPS OTHER TECH AND FEATURES: No-Twist Tri-Glides, Sweat Guide, and MIPS integrated with fit system WEIGHT: 255 grams. SPECIFICATIONS: 19 Vents. Sizes: Small 52-56 cm and Medium 55-59 cm.