Thor Sentinel Pro Body Protector Thor, one of the leading gear brands in the industry, has been around for a long, long time and you don’t do that without making a worthy product. One of the newer releases in Thor’s catalogue is their Sentinel Pro Roost Guard, the same piece that you see much of the Star Racing Yamaha riders wear for Supercross & Motocross. It features lightweight, low-profile panel designs on the front and back, a press-fit moulded and ventilated comfort liner, a slew of ventilation ports, adjustable elastic straps with ratcheting buckles, and adjustable shoulder straps.