What is the cork filler?Updated a year ago

In a Goodyear-welted shoe, the cork filler refers to a layer of cork material that is used to fill the cavity between the insole and the outsole. 

This cork layer not only provides additional cushioning for comfort but also conforms to the shape of the wearer's foot over time, enhancing the shoe's comfort and fit. 

Additionally, the cork filler in Goodyear-welted shoes contributes to their breathability and insulation properties.