These are what I found in the supermarket when I wanted cushioned insoles a while back; they're comfortable, and haven't fallen to bits yet. About 4mm thick at the toe end and maybe twice that under the heel.
@Five-Hats started
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These are what I found in the supermarket when I wanted cushioned insoles a while back; they're comfortable, and haven't fallen to bits yet. About 4mm thick at the toe end and maybe twice that under the heel.