Ear loops are long strips of rolled spandex that anchor the mask at your ears (or at an ear saver, like a headband with buttons sewn on.) Loops are threaded vertically from side corner to side corner. This is the standard style of mask, and the one most people are used to.
Cord ties are ⅛” MFP rope that threads through the mask and around your head. The cord isn’t stretchy and must be tied and/or secured with a cord lock (included). This takes longer to put on and take off, but it’s comfortable, secure, and allows for a wide range of adjustments.
The Hybrid has a long spandex loop across the top which secures it around the back of the head, and a ⅛” cord with a cord lock that secures the bottom of the mask around the back of the neck. It’s Eli’s favorite. Easy to adjust, comfy, creates a good seal, pulls the top corners of the mask up and the bottom corners down, and doesn’t touch the ears.