Birko-cell Foam Spacer by Birkenstock Various colors Birko-cell Foam
The perfect insole solution for shoes or clogs that are too roomy. Place the spacer underneath a removable footbed and make a loose shoe or clog fit just right. 3 mm thick Birko-cell is a washable and durable non-absorbent foam you can cut-to-size.
Sold in wide widths, but you may trim with scissors to fit your particular shoe style.