Standard Quad is for general use (eg racing and trail riding),
Heavy Duty is for maximum protection (eg Cattle-dog claws).
Top Stitched Looks good and guides water runoff on Quad seats.
Wax Converters Very tightly woven, hard wearing, fully waterproofed.
The Standard Quad seat covers are slippery when wearing nylon motocross pants. Professional racers love it; club riders find it tiring.
Standard Quad and Heavy Duty Quad share the same designs.