It's hard to get excited about insoles, so I won't try. It is nice, though, to have the ability to extend the life of your investment in higher end riding shoes with something this simple and important. Tossed the old and dropped in these light weight replacements. Didn't miss a beat. Perfect fit for the size of my shoe. Would highly recommend. After 4000 miles of road, your feet deserve at least a new insole. A lot of miles left in the well made Sidi shoes.
When I received the shoes, the holes in the insoles were punched from the bottom up, thus creating an unwelcome uneven effect. I bought the replacement insoles in essence to correct this error. Not sure why the original were faulty.
Sidi Comfort insoles are used on Specialized brand bike shoes for cool summer rides. This a common brand with a common application. I expected the insole vent holes to line up with the bike shoe vent holes and cover the length of the insole. They did not, so I had to add holes the correct the design flaw.
I wear Sidi Genius 6.6 Mega road shoes. I have one pair that is 12 years old, bought them in 2006. The other pair I bought a few months ago, they were New Old Stock. I bought these insoles for the older pair. They feel better than the stock insoles (which I really had no problem with, just replaced them because they were worn out). I don't understand the negative reviews I've seen on these insoles. They are fine and feel really good. These are priced well and are a great deal.
I would consider these as replacements for worn out original insoles but not much of an upgrade. They are very thin and as the other reviewer said, offer no arch support, aren't moldable at all, etc. Just be aware of what you are getting.
Not much to say here - these insoles feature a metatarsal reinforcement and anti microbial treatment (possibly some more heel support) vs. the stock insoles. Sidi insoles are kind of a joke and these should come stock on a [$] pair of shoes, but I digress.
Bottom line, if you need some metatarsal support get these, they are cheap and fit perfectly in the shoes. If you need tons of options for arch support, look elsewhere.
I am on my third pair of Sidi and cannot say enough about the shoe quality but this insert under whelmed me. For the price they really did not do anything that the old ones did but I guess the smell better.