One of the handiest clothing devices ever made. Since buttons.

Basically they work like buttons, but better. Hang on.

[Goes off to get something he owns with a zipper, which honestly isn't much. Actually he just straight up steals a pair of Ace's shorts. He won't miss them.]

Tada! [Explains zippers a little. This is genuinely so much disturbed if you know a lot about Marco.] They're like teeth for clothing!