1. a removable sole placed inside a shoe for comfort, support, or warmth
2. the inner bottom part of a shoe or boot

Examples

• She bought gel insoles to make her work shoes more comfortable.
• The orthotic insoles helped reduce his foot pain.
• Remove the insoles from your sneakers before washing them.
• The insole of his boot was worn smooth from years of use.
• Memory foam insoles provide extra cushioning for long walks.
• The shoe’s insole had the brand name printed on it.