Bravo Sports VFX Aggressive Protective Knee/Elbow/Wrist Pads Cap is vented, impact resistant PVC plastic, Strap system is 40mm hook and loop straps with PVC plastic Ventilation has the max-flow design provides superior airflow ventilation through perforated foam padding and cap vents Rear elastic supports keep pads in place Hinge-Flex design allows pad to move in sync with the joints for maximum fit Ages 10 and up