Horn, bone, wood, metal, and pearl/mother-of-pearl were all popular at one time or another. Nowadays, of course, most buttons are made of plastic.
Buttons are usually made out of plastic or older ones were made out of wood.
They made buttons first.
well it really depends, what the zips/buttons are made of and the size
A test usedto determine such strength or activity
I think there made from rubber.
Buttons
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They are made of Silicone rubber.
walking or by train especially in carts
Plastic and rubber.
Plastic or cloth
Plastic.