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

In a sneaker insole, an auxetic gel or rubber foam might better cushion the foot when it strikes the ground.

From Science Daily • Jun. 4, 2024

The reigning AL MVP said he’s been fitted with an insole for support.

From Washington Times • Jul. 15, 2023

Though Adidas would have to avoid using Ye’s image and likeness and strip the Yeezy branding, it wouldn’t be noticeable since most of the branding is on the sneaker insole, where people can’t see it.

From Washington Post • Oct. 11, 2022

Sustainably made from recycled plastic bottles, natural cork, harvested algae foam, EVA and 100% organic cotton laces, they’re vegan, ultra-light and comfy, with a removable insole.

From Seattle Times • Nov. 12, 2021

I didn’t carry incriminating evidence around under the insole of my right shoe.

From "Glitch" by Laura Martin