This rating is probably confused with a general rating of my Sidi shoes. The Sidi design allows for replacement of any parts as they wear to extend the lifetime of their shoes. This design has kept my old Sidis going for 10 years. I do replace the heel pads once or twice a year. Straps and buckles also are replaceable and I occasionally replace the straps, heel pads and cleats to refresh the shoes.
After years years of riding the old black shoens I finally purchased a new pair of Sidi white shoes for summer last year. Still the fully maintainable, interchangeable design. The old shoes are now relegated to winter riding.