Features • Technology : Rotexx: patent-pending Rotary Damping System • Weight: 10.6 oz / 300 g • Features: Inner evacuation channels • Construction: In-Mold: Industrial process binding the microplastic and polystyrene together to add superior mechanical properties to these materials • Number of Vents: 20 vents • Stabilizing System: Spiderlock® Solo IV: Easy one-handed adjustment • Straps: Steplock adjustment: Easy and secure straps adjustment. • Padding: Airdry padding • Certifications: CPSC-ASTM F1447-CEN