1. the inside sole of a shoe or boot, often removable, that provides cushioning and support for the foot

Examples

• The innersole of my running shoe provides extra arch support.
• She replaced the worn innersole with a new cushioned one.
• The leather innersole helps absorb moisture from my feet.
• Remove the innersole before washing your sneakers.
• The orthotic innersole corrected his foot alignment.
• These boots come with a removable innersole for easy cleaning.