There three different questions here. *Can* it be done. *Would* someone think of it. *Should* I let it happen?
Can? Sure, why not. You may want to talk with a locksmith about it. Or a very specialized blacksmith.
Would? Probably not. It took hundreds of years, an industrial revolution, and automated machines for it to be thought of on Earth, and even then just barely. And why would someone think of it? Remember, in out time, things are often thought of to *create* a market. Middle ages were a different thought process.
Should? Sure, why not? Just make it a 'dwarven' thing. And maybe Elves think it is stupid. Or if that is too obvious say the halflings invented it as a toy... or whatever.
Most fantasy is loosely based on midievel Earth, but that doesn't mean you can't have differences.
Allow PC in introduce zipper? No.
Allow zippers to be part of world? Sure.
Can? Sure, why not. You may want to talk with a locksmith about it. Or a very specialized blacksmith.
Would? Probably not. It took hundreds of years, an industrial revolution, and automated machines for it to be thought of on Earth, and even then just barely. And why would someone think of it? Remember, in out time, things are often thought of to *create* a market. Middle ages were a different thought process.
Should? Sure, why not? Just make it a 'dwarven' thing. And maybe Elves think it is stupid. Or if that is too obvious say the halflings invented it as a toy... or whatever.
Most fantasy is loosely based on midievel Earth, but that doesn't mean you can't have differences.
Allow PC in introduce zipper? No.
Allow zippers to be part of world? Sure.