Instructables

Step 3: Casting Your Foot: preparation

Making lasts is a great way of ensuring a perfect fit for your feet. For this process, you will need alginate to make a mold of your foot, a casting material, and a box to hold your mold in.

To make your mold, you first need a makeshift box for your foot.

Leave plenty of room around your foot (note: the more space you leave the more alginate you'll need to use).