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

He headed the ball further downfield to beat three defenders with his pace and used the insole of his right foot to delicately slip the ball past Portland keeper David Bingham in the 30th minute.

From Seattle Times • Sep. 2, 2023

There will even be an insole with a nod to the movie “Bring it On” because Delle Donne had a crush on the character Missy.

From Washington Post • Jul. 9, 2022

Peters picked up a flip-flop, an insole, a foam insert from a bikini cup, an N95 mask, twisted sheets of cellophane and one of his most despised forms of beach trash.

From Los Angeles Times • Jun. 19, 2021

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

From "Glitch" by Laura Martin