Here's what other sites are saying:
Extra support worthy of the expert's we serve, the Airthotic(R) is a half- length, molded polyurethane instep that cups the heel and supports the arch area of the foot. More rigid than a foam footbed, the raised arch support won't compress over time, and is perforated for improved air circulation and comfort.
Sole Signature EV Ultra Moldable Footbed
L.L.Bean Shearling Insoles
Lowa Civetta Extreme Replacement Liner
Montrail Enduro-Sole LP
Sof Sole Arch Insole
Thermacell Heated Insoles