Thor Quadrant MX Motocross Chest Protector Roost Guard - Youth (60-100 lbs) This is an awesome Thor Quadrant MX motocross chest protector / roost guard in good condition! It features a nice clear poly-carbonate chassis with a sharp red and black graphic design. Great adjustable straps and arm guards to make sure it fits comfortably and securely. It provides awesome upper-body protection and deflecting for dirt biking, ATVs, or mountain riding.