Removeable braces are made of a plastic plate with wires and clips attached. They are usually only taken out of the mouth to be cleaned or during some sports.
If you lose or break a removable brace, you will probably need to have another made. Care must be taken when cleaning your brace, as some parts may be quite delicate and could be damaged easily.
Everyone's brace is made to fit their own teeth, and move the teeth until they are in the correct position.