Folding Elastics FOE
Fold over elastic, also known as FOE is a slim, flat elastic that has a line running along the centre of its length. The line is slightly off-centre to ensure you catch the underside of the elastic when stitching it. Simply fold it in half over the raw edge of the fabric (larger side underneath) and zig-zag, serpentine or twin needle it in place while gently easing it using a stretch and relax method (as shown in the Booby Traps patterns). Sold by the metre, it is commonly in a 15mm wide profile but can be bought in a variety of widths. It will often have one matte side and one shiny side. You can use either depending on your preference.