The Sidi dual-density insoles great way to upgrade you Sidi shoes or any shoes for that matter. The dual density material offers comfort and support and superb heel grip. The front of the insole is perforated for air flow and ventilation.
Armed with a pair of scissors, you can trim the insoles to fit virtually any shoes using the insole you are replacing as a template.
Just got these from Excel for my Sidi Genius 5 Pro Carbon road shoes. They are a tad bit thicker but do give a better feel on your foot. They also cup your heel better because they are wider than the standard blue insoles. Worth the money? I think so. We'll see how they feel on the century rides to come :)
Pros: Has a better feel than stock blue insoles
Cons: It could be just a tad thicker