Metallic fiber is a special type of thread that can be woven into fabric to make it sparkly and shiny like a princess dress! The thread is made out of tiny bits of metal, kind of like how Legos are made out of little bricks.
When people use metallic fiber to make a fabric, they can mix it in with other types of threads like cotton or polyester to create a special effect. It can be used to make special dresses, costumes, or even shiny decorations.
Since metallic fiber is made of metal, it's important to be careful when you wear it! You don't want to wear it in the rain or get it wet, because the metal could rust and the fabric might not look as pretty anymore.
So basically, metallic fiber is a special thread made of metal that gets woven into fabric to make it sparkly and fun!