Using these Ellipse Cord Locks is a breeze. First, remove the old or broken cord lock from your gear. Then, thread the cord through the hole in the ellipse toggle. Pull the cord tight to adjust the tension as you like. You can use them on jackets, sleeping bags, shoes, or any other item with cords up to 3/16” thick. When it comes to maintenance, just keep them clean and dry. Avoid exposing them to sharp objects that could damage the toggles. If you notice any signs of wear, it's a good idea to replace them to keep your cords secure.