Midsole

Origin

- + sole

Full definition of midsole

Noun

1. The layer of a shoe in between the outsole and insole, typically there for shock absorption.
• 2007, December 13, Sarah Bowen Shea, Racing to Be in Step With the Green Movement, But that is not stopping Brooks Sports from introducing its BioMoGo midsole, made with an additive that the company says will promote the break down of the polymers within 20 years.