You've heard about these footbeds from the Wolvhammer, but these are just too great to keep out of the shoes of anyone looking for a better insulating foot bed. The 45Nrth Jaztronaut is the first temperature-blocking insole designed for cycling footwear. Constructed with a 2mm panel of non-compressible aerogel insulation laminated inside durable EVA foam.
What separates the Jaztronaut from your stock footbed is the aerogel, a porous nanotechnology that has been used by NASA to insulate astronaut spacesuits. This is a great application of this material, as it has the highest thermal performance of any insulation and does not require loft to trap heat.
Simply put, these insoles say no to cold cleats, and yes to warm feet, even under pedal load.