insole

American  

[in-sohl] / ˈɪnˌsoʊl /

noun

1. the inner sole of a shoe or boot.

2. a thickness of material laid as an inner sole within a shoe, especially for comfort.

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insole British  

/ ˈɪnˌsəʊl /

noun

1. the inner sole of a shoe or boot

2. a loose additional inner sole used to give extra warmth, comfort, etc

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Etymology

Origin of insole

First recorded in 1850–55; in + sole ²

Example Sentences

The man starts with a detailed, if somewhat robotic response—like users might get from an AI chatbot—before spewing out an ad for “StepBoost Max” insoles.

From The Wall Street Journal

We are excited about the acquisition, whose main business is making open-cell foam insoles.

From Barron's

Featuring a western-inspired silhouette with belted accents and a wide insole for maximum comfort, the calf-length Santiago Boots are no exception.

From Los Angeles Times

Amira has a doctor's note that allows her to wear padded soft trainers with gel insoles at school.

From BBC

Instead, Carse changed to a narrower boot, got new insoles and cut a different hole into his footwear.

From BBC