Many cosplayers use "reverse coil" zippers or waterproof zippers (which look like gaskets when closed) to keep the functionality of a zip while minimizing its visual profile. "Canon" vs. Costuming Rules
On boots and gaiters, exposed zippers are often only acceptable if they are located on the inside or back of the leg and color-matched to the material. tmandalorians1hev-zip
If it’s not seen on a Mandalorian on screen, many high-level costuming clubs will consider it a "no-go" for official approval. Many cosplayers use "reverse coil" zippers or waterproof
There is often debate between what is seen on screen and what costuming clubs require: tmandalorians1hev-zip
For fans and cosplayers aiming for "official" approval, zippers are often permitted but must follow strict concealment rules: