Thor 2013 Thor Youth Quadrant Protector (CLEAR/BLACK) The Thor Quadrant youth chest protector has been developed with serious riders in mind, providing maximum coverage with minimal restriction. Thor Quadrant youth protector features improved injection molded chest and back panels that contour the body in the riding position. Extensive venting on both panels provides great airflow. Molded bio-foam padding is used throughout the Thor Quadrant protector for superior impact absorption and comfort. Thor incorporated removable upper arm guards that allow the rider to adjust the amount of protection.