>>149821664
Mechanical. It's part of Spider-Man's character and there are a lot of things that you can do with them that organically wouldn't be possible. Like magnetizing them or using a special substance, like asbestos

>>149822267
>or give the devices the ability to produce several specialized types of webbing.
That's how it was during the first run. But after that it feels like they thought that it was stupid to remark that. Bad decision