Flat shoelaces are the most common type of laces used in sneakers such as Nike Air Force 1's, and come in a wide range of materials, colors, and lengths. They feature a flat profile, with a width that is consistent throughout the length of the lace. Flat laces offer a classic and streamlined look that complements most styles of sneakers. They're easy to tie and provide a secure fit, making them a reliable choice for everyday wear.