Turn Down The Volume
The new insole mixes a 10% carbon-fibre reinforced cap under the heel and instep with an ultralight foam layer to produce a stiffer structure that's also very low profile. That's important because it means the insole can be used in snug-fitting performance shoes without reducing the internal volume of the footwear.
Increased volume is a side-effect of many of the aftermarket footbeds out there, which can be handy if you're trying to snug-up a shoe that's too roomy for you, but is problematic if you don't have much space to play with.
Closed Cell Foam
The foam is a tough, closed-cell version which won't absorb fluid and, says Superfeet, is durable too, perforated to improve cooling and has a bevelled edge to improve fit. There's also a natural anti-microbial treatment to inhibit the growth of bacteria and other odour-producing nasties.
Finally, the stiffness of the carbon cap means the footbed doesn't need buttressing like other low-profile Superfeet designs, which means it plays nicer with Gore-Tex and other waterproof liners and is less likely to wear through them.
Should be ideal for anyone looking for an aftermarket footbed to suit a pair of close-fitting walking, running or cycling shoes or boots, where there's not much room for a thicker insole.