If you use full insole/inserts at least a 1/8 inch thick, then we recommend adding a note to your order. You will be able to add custom notes on checkout. In the note, the box informs us that you will be using your own insole/insert. UPMEN will build the boot without an insole. You will still have the benefit of the cork midsole. This way, you will have ample room in your boot to place your insert. Note Example "I wear custom full insoles over 1/8 inch thick. I would like the boots made without the insole."